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ZSI_Reconnect_China/PATSTAT/CPCSchemeXML202302/cpc-scheme-B64C.xml

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<?xml version="1.0" encoding="UTF-8"?>
<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="B64C" definition-exists="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>AEROPLANES</text></title-part><title-part><text>HELICOPTERS</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>As far as possible, classification is made according to constructional features; classification according to particular kinds of aircraft is normally regarded as being of secondary importance, except in cases where this is considered to be the characteristic feature.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">B64C35/02</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">B64C35/00</class-ref></entry></row></table></note-paragraph><note-paragraph><CPC-specific-note>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</CPC-specific-note></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="B64C1/00" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Aircraft structures or fairings</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C1/00" definition-exists="true" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Fuselages</text></title-part><title-part><text>Constructional features common to fuselages, wings, stabilising surfaces or the like</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/00</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/0009" definition-exists="true" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Aerodynamic aspects</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/0009</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C1/0018" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising two decks adapted for carrying passengers only</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C1/0027" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged one above the other</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C1/0036" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged side by side at the same level</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C1/0045" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>B64C2001/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fuselages characterised by special shapes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C1/0054" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fuselage structures substantially made from particular materials</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C1/0063" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>from wood</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C1/0072" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>from composite materials</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C1/0081" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>from metallic materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C1/009" definition-exists="false" ipc-concordant="B64C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2001/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising decompression panels or valves for pressure equalisation in fuselages or floors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/06" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/06</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Frames</text></title-part><title-part><text>Stringers</text></title-part><title-part><text>Longerons </text><CPC-specific-text><text>; Fuselage sections</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/06</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>-<class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref>-<class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/061" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frames</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/061</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>-<class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref>-<class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/062" definition-exists="false" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to absorb crash loads</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/062</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref>-<class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/063" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Folding or collapsing to reduce overall dimensions, e.g. foldable tail booms </text><reference><text>folding or collapsing wings <class-ref scheme="cpc">B64C3/56</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/063</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/064" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stringers; Longerons</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/064</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/065" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spars</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/065</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/066" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interior liners</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/067" definition-exists="false" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising means for preventing icing or condensation conditions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/068" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fuselage sections</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/068</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/0683" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>B64C1/0683</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Nose cones</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/0685" definition-exists="true" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>B64C1/0685</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Tail cones</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/069" definition-exists="false" ipc-concordant="B64C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Joining arrangements therefor</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/069</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/08" definition-exists="false" ipc-concordant="B64C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geodetic or other open-frame structures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/10" definition-exists="true" ipc-concordant="B64C1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bulkheads</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/12" definition-exists="true" ipc-concordant="B64C1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction or attachment of skin panels</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/14" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Windows</text></title-part><title-part><text>Doors</text></title-part><title-part><text>Hatch covers or access panels</text></title-part><title-part><text>Surrounding frame structures</text></title-part><title-part><text>Canopies</text></title-part><title-part><text>Windscreens </text><CPC-specific-text><text>accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers</text></CPC-specific-text><reference><text>fairings movable in conjunction with undercarriage elements <class-ref scheme="cpc">B64C25/16</class-ref>; bomb doors <class-ref scheme="cpc">B64D1/06</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/1407" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Doors; surrounding frames</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1415" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cargo doors, e.g. incorporating ramps</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1423" definition-exists="false" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passenger doors</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C1/143" definition-exists="false" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the plug type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C1/1438" definition-exists="false" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the sliding type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1446" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inspection hatches </text><reference><text>for engine cowls <class-ref scheme="cpc">B64D29/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1453" definition-exists="false" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Drain masts</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1461" definition-exists="false" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structures of doors or surrounding frames</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1469" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Doors between cockpit and cabin</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/1476" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Canopies; Windscreens or similar transparent elements</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1484" definition-exists="false" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Windows </text><reference><text><class-ref scheme="cpc">B64C1/1492</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/1492" definition-exists="true" ipc-concordant="B64C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/1492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure and mounting of the transparent elements in the window or windscreen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/16" definition-exists="true" ipc-concordant="B64C1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for mounting power plant</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/18" definition-exists="true" ipc-concordant="B64C1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Floors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/20" definition-exists="true" ipc-concordant="B64C1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for freight</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/22" definition-exists="true" ipc-concordant="B64C1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>B64C1/22</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Other structures integral with fuselages to facilitate loading </text><CPC-specific-text><text>, e.g. cargo bays, cranes </text><reference><text>cargo door type ramps <class-ref scheme="cpc">B64C1/1415</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/24" definition-exists="true" ipc-concordant="B64C1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/24</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Steps mounted on, and retractable within, fuselages</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/26" definition-exists="false" ipc-concordant="B64C1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Attaching the wing or tail units or stabilising surfaces</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/26</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U20/50</class-ref> and <class-ref scheme="cpc">B64U30/12</class-ref> - <class-ref scheme="cpc">B64U30/16</class-ref>. <br/>Groups <class-ref scheme="cpc">B64C1/26</class-ref>, <class-ref scheme="cpc">B64U20/50</class-ref> and <class-ref scheme="cpc">B64U30/12</class-ref> - <class-ref scheme="cpc">B64U30/16</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/28" definition-exists="false" ipc-concordant="B64C1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parts of fuselage relatively movable to improve pilots view</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/30" definition-exists="true" ipc-concordant="B64C1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/30</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Parts of fuselage relatively movable to reduce overall dimensions of aircraft</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C1/30</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64U20/50</class-ref>.<br/>Groups <class-ref scheme="cpc">B64C1/30</class-ref> and <class-ref scheme="cpc">B64U20/50</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/32" definition-exists="true" ipc-concordant="B64C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/32</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Severable or jettisonable parts of fuselage facilitating emergency escape</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/34" definition-exists="true" ipc-concordant="B64C1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/34</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>comprising inflatable structural components</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/36" definition-exists="true" ipc-concordant="B64C1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/36</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>adapted to receive antennas or radomes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/38" definition-exists="true" ipc-concordant="B64C1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructions adapted to reduce effects of aerodynamic or other external heating </text><CPC-specific-text><reference><text>cooling structural parts of aircrafts with air flow <class-ref scheme="cpc">B64D13/006</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C1/40" definition-exists="true" ipc-concordant="B64C1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C1/40</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Sound or heat insulation </text><CPC-specific-text><text>, e.g. using insulation blankets</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C1/403" definition-exists="true" ipc-concordant="B64C1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangement of fasteners specially adapted therefor, e.g. of clips </text><reference><text>in vehicles in general <class-ref scheme="cpc">B60R13/0206</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C1/406" definition-exists="true" ipc-concordant="B64C1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C1/406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with supports for lines, e.g. for pipes or cables </text><reference><text>arrangement of elements of electric or fluid circuits specially adapted for vehicles, in general <class-ref scheme="cpc">B60R16/00</class-ref>; supports for pipes, cables or protective tubing <class-ref scheme="cpc">F16L3/00</class-ref>; installations of electric cables or lines in vehicles <class-ref scheme="cpc">H02G3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C3/00" definition-exists="true" ipc-concordant="B64C3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Wings </text><reference><text>ornithopter wings <class-ref scheme="cpc">B64C33/02</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/10" definition-exists="false" ipc-concordant="B64C3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>B64C3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape of wings</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/14" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aerofoil profile</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C3/141" definition-exists="true" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circulation Control Airfoils</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/142" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable camber along the airfoil chord</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/143" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising interior channels</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/144" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including a flat surface on either the extrados or intrados</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/145" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising &apos;Gurney&apos; flaps</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/146" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising leading edges of particular shape</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/147" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising trailing edges of particular shape</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/148" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising protuberances, e.g. for modifying boundary layer flow</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/149" definition-exists="false" ipc-concordant="B64C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/149</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for supercritical or transonic flow</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/16" definition-exists="true" ipc-concordant="B64C3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>B64C3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frontal aspect</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/18" definition-exists="true" ipc-concordant="B64C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/18</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Spars</text></title-part><title-part><text>Ribs</text></title-part><title-part><text>Stringers</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/182" definition-exists="true" ipc-concordant="B64C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stringers, longerons</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/185" definition-exists="true" ipc-concordant="B64C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spars</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/187" definition-exists="false" ipc-concordant="B64C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ribs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/20" definition-exists="true" ipc-concordant="B64C3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/20</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Integral or sandwich constructions</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/22" definition-exists="false" ipc-concordant="B64C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geodetic or other open-frame structures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/24" definition-exists="false" ipc-concordant="B64C3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Moulded or cast structures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/26" definition-exists="true" ipc-concordant="B64C3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction, shape, or attachment of separate skins, e.g. panels</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/28" definition-exists="false" ipc-concordant="B64C3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading or trailing edges attached to primary structures, e.g. forming fixed slots</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/30" definition-exists="true" ipc-concordant="B64C3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/30</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>comprising inflatable structural components</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/32" definition-exists="true" ipc-concordant="B64C3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for mounting power plant</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/34" definition-exists="true" ipc-concordant="B64C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/34</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Tanks constructed integrally with wings, e.g. for fuel or water</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/36" definition-exists="true" ipc-concordant="B64C3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structures adapted to reduce effects of aerodynamic or other external heating </text><CPC-specific-text><reference><text>cooling structural parts of aircrafts with air flow <class-ref scheme="cpc">B64D13/006</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/38" definition-exists="false" ipc-concordant="B64C3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjustment of complete wings or parts thereof</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/385" definition-exists="false" ipc-concordant="B64C3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable incidence wings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/40" definition-exists="false" ipc-concordant="B64C3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Varying angle of sweep</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/42" definition-exists="false" ipc-concordant="B64C3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjusting about chordwise axes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/44" definition-exists="false" ipc-concordant="B64C3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Varying camber</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/445" definition-exists="false" ipc-concordant="B64C3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by changing shape according to the speed, e.g. by morphing</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C3/46" definition-exists="true" ipc-concordant="B64C3/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/46</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>by inflatable elements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C3/48" definition-exists="true" ipc-concordant="B64C3/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by relatively-movable parts of wing structures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C3/50" definition-exists="true" ipc-concordant="B64C3/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/50</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>by leading or trailing edge flaps</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/52" definition-exists="false" ipc-concordant="B64C3/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Warping</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/54" definition-exists="true" ipc-concordant="B64C3/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/54</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Varying in area</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C3/543" definition-exists="false" ipc-concordant="B64C3/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2003/543</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by changing shape according to the speed, e.g. by morphing</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C3/546" definition-exists="true" ipc-concordant="B64C3/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/546</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by foldable elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C3/56" definition-exists="true" ipc-concordant="B64C3/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C3/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Folding or collapsing to reduce overall dimensions of aircraft</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C3/56</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U20/50</class-ref> and <class-ref scheme="cpc">B64U30/12</class-ref> - <class-ref scheme="cpc">B64U30/16</class-ref>. <br/>Groups <class-ref scheme="cpc">B64C3/56</class-ref>, <class-ref scheme="cpc">B64U20/50</class-ref> and <class-ref scheme="cpc">B64U30/12</class-ref> - <class-ref scheme="cpc">B64U30/16</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C3/58" definition-exists="true" ipc-concordant="B64C3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C3/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with fences or spoilers </text><reference><text>adjustable for control purposes <class-ref scheme="cpc">B64C9/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C5/00" definition-exists="true" ipc-concordant="B64C5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C5/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Stabilising surfaces</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C5/02" definition-exists="true" ipc-concordant="B64C5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C5/02</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Tailplanes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C5/04" definition-exists="true" ipc-concordant="B64C5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Noseplanes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C5/06" definition-exists="true" ipc-concordant="B64C5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C5/06</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Fins </text><reference><text><class-ref scheme="cpc">B64C5/08</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C5/08" definition-exists="true" ipc-concordant="B64C5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C5/08</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>mounted on, or supported by, wings</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C5/10" definition-exists="true" ipc-concordant="B64C5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adjustable</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C5/12" definition-exists="true" ipc-concordant="B64C5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for retraction against or within fuselage or nacelle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C5/14" definition-exists="true" ipc-concordant="B64C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Varying angle of sweep</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C5/16" definition-exists="true" ipc-concordant="B64C5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>about spanwise axes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C5/18" definition-exists="true" ipc-concordant="B64C5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C5/18</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>in area</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C7/00" definition-exists="true" ipc-concordant="B64C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>B64C7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structures or fairings not otherwise provided for</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C7/02" definition-exists="true" ipc-concordant="B64C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nacelles</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="B64C9/00" date-revised="2023-01-01" status="published"><classification-symbol>B64C9/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C9/00" definition-exists="true" ipc-concordant="B64C9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjustable control surfaces or members, e.g. rudders </text><reference><text>trimming stabilising surfaces <class-ref scheme="cpc">B64C5/10</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C9/005" definition-exists="false" ipc-concordant="B64C9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2009/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ailerons</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/02" definition-exists="true" ipc-concordant="B64C9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting or supporting thereof</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/04" definition-exists="true" ipc-concordant="B64C9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with compound dependent movements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/06" definition-exists="false" ipc-concordant="B64C9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with two or more independent movements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/08" definition-exists="true" ipc-concordant="B64C9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C9/08</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>bodily displaceable</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/10" definition-exists="true" ipc-concordant="B64C9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>one surface adjusted by movement of another, e.g. servo tabs </text><reference><text><class-ref scheme="cpc">B64C9/04</class-ref> takes precedence; adjusting surfaces of different type or function <class-ref scheme="cpc">B64C9/12</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/12" definition-exists="false" ipc-concordant="B64C9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>surfaces of different type or function being simultaneously adjusted</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/14" definition-exists="true" ipc-concordant="B64C9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C9/14</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>forming slots</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C9/143" definition-exists="false" ipc-concordant="B64C9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2009/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising independently adjustable elements for closing or opening the slot between the main wing and leading or trailing edge flaps</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/146" definition-exists="true" ipc-concordant="B64C9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at an other wing location than the rear or the front </text><reference><text>wings provided with fixed fences or spoilers <class-ref scheme="cpc">B64C3/58</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/16" definition-exists="true" ipc-concordant="B64C9/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at the rear of the wing</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C9/18" definition-exists="true" ipc-concordant="B64C9/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by single flaps</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C9/20" definition-exists="true" ipc-concordant="B64C9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by multiple flaps</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/22" definition-exists="true" ipc-concordant="B64C9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at the front of the wing</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C9/24" definition-exists="true" ipc-concordant="B64C9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by single flap</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C9/26" definition-exists="true" ipc-concordant="B64C9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by multiple flaps</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/28" definition-exists="false" ipc-concordant="B64C9/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by flaps at both the front and rear of the wing operating in unison</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/30" definition-exists="false" ipc-concordant="B64C9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Balancing hinged surfaces, e.g. dynamically</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/32" definition-exists="true" ipc-concordant="B64C9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C9/32</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Air braking surfaces</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/323" definition-exists="false" ipc-concordant="B64C9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>associated with wings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/326" definition-exists="false" ipc-concordant="B64C9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>associated with fuselages</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/34" definition-exists="true" ipc-concordant="B64C9/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>collapsing or retracting against or within other surfaces or other members</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C9/36" definition-exists="false" ipc-concordant="B64C9/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the members being fuselages or nacelles</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C9/38" definition-exists="true" ipc-concordant="B64C9/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C9/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Jet flaps</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C11/00" definition-exists="true" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C11/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Propellers, e.g. of ducted type</text></title-part><title-part><text>Features common to propellers and rotors for rotorcraft</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Documents classified in <class-ref scheme="cpc">B64C11/001</class-ref> - <class-ref scheme="cpc">B64C11/008</class-ref> which also contain relevant information, covered by other subgroups of <class-ref scheme="cpc">B64C11/00</class-ref>, are also classified in the appropriate subgroup of <class-ref scheme="cpc">B64C11/00</class-ref></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/001" definition-exists="false" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shrouded propellers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/002" definition-exists="false" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Braking propellers, e.g. for measuring the power output of an engine</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/003" definition-exists="false" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable-diameter propellers; Mechanisms therefor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/005" definition-exists="false" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spiral-shaped propellers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/006" definition-exists="false" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Paddle wheels</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/007" definition-exists="false" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Propulsive discs, i.e. discs having the surface specially adapted for propulsion purposes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/008" definition-exists="true" ipc-concordant="B64C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by vibration absorbing or balancing means </text><reference><text>for rotorcraft <class-ref scheme="cpc">B64C27/001</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/02" definition-exists="false" ipc-concordant="B64C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hub construction</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/04" definition-exists="false" ipc-concordant="B64C11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Blade mountings</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/06" definition-exists="false" ipc-concordant="B64C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for variable-pitch blades</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C11/065" definition-exists="false" ipc-concordant="B64C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>variable only when stationary</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/08" definition-exists="false" ipc-concordant="B64C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for non-adjustable blades</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C11/10" definition-exists="false" ipc-concordant="B64C11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>rigid</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C11/12" definition-exists="false" ipc-concordant="B64C11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>flexible</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/14" definition-exists="false" ipc-concordant="B64C11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spinners</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/16" definition-exists="false" ipc-concordant="B64C11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Blades</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/18" definition-exists="false" ipc-concordant="B64C11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aerodynamic features</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/20" definition-exists="false" ipc-concordant="B64C11/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/205" definition-exists="false" ipc-concordant="B64C11/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for protecting blades, e.g. coating</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/22" definition-exists="true" ipc-concordant="B64C11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid blades</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/24" definition-exists="true" ipc-concordant="B64C11/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow blades</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/26" definition-exists="true" ipc-concordant="B64C11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fabricated blades</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/28" definition-exists="false" ipc-concordant="B64C11/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collapsible or foldable blades</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/30" definition-exists="false" ipc-concordant="B64C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Blade pitch-changing mechanisms</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Groups <class-ref scheme="cpc">B64C11/301</class-ref>, <class-ref scheme="cpc">B64C11/303</class-ref>, <class-ref scheme="cpc">B64C11/305</class-ref> and <class-ref scheme="cpc">B64C11/306</class-ref> take precedence over <class-ref scheme="cpc">B64C11/32</class-ref>, <class-ref scheme="cpc">B64C11/38</class-ref> and <class-ref scheme="cpc">B64C11/44</class-ref></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/301" definition-exists="false" ipc-concordant="B64C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/301</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by blade position indicating means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/303" definition-exists="false" ipc-concordant="B64C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/303</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by comprising a governor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/305" definition-exists="false" ipc-concordant="B64C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by being influenced by other control systems, e.g. fuel supply</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/306" definition-exists="false" ipc-concordant="B64C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for contrarotating propellers</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/308" definition-exists="false" ipc-concordant="B64C11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>automatic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/32" definition-exists="false" ipc-concordant="B64C11/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mechanical</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/325" definition-exists="false" ipc-concordant="B64C11/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising feathering, braking or stopping systems</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/34" definition-exists="false" ipc-concordant="B64C11/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>automatic</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C11/343" definition-exists="false" ipc-concordant="B64C11/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/343</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>actuated by the centrifugal force or the aerodynamic drag acting on the blades</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C11/346" definition-exists="false" ipc-concordant="B64C11/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/346</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>actuated by the centrifugal force or the aerodynamic drag acting on auxiliary masses or surfaces</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/36" definition-exists="false" ipc-concordant="B64C11/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>non-automatic</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/38" definition-exists="false" ipc-concordant="B64C11/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>fluid, e.g. hydraulic</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/385" definition-exists="false" ipc-concordant="B64C11/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising feathering, braking or stopping systems</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/40" definition-exists="false" ipc-concordant="B64C11/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>automatic</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C11/42" definition-exists="false" ipc-concordant="B64C11/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>non-automatic</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/44" definition-exists="false" ipc-concordant="B64C11/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electric</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C11/46" definition-exists="true" ipc-concordant="B64C11/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C11/46</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangements of, or constructional features peculiar to, multiple propellers </text><CPC-specific-text><reference><text><class-ref scheme="cpc">B64C11/306</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/48" definition-exists="false" ipc-concordant="B64C11/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Units of two or more coaxial propellers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C11/50" definition-exists="false" ipc-concordant="B64C11/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C11/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Phase synchronisation between multiple propellers</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C13/00" definition-exists="true" ipc-concordant="B64C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C13/02" definition-exists="false" ipc-concordant="B64C13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Initiating means</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C13/04" definition-exists="true" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>actuated personally</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/042" definition-exists="false" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/042</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>operated by hand</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/0421" definition-exists="false" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>B64C13/0421</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>control sticks for primary flight controls</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/0423" definition-exists="false" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>B64C13/0423</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>yokes or steering wheels for primary flight controls</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/0425" definition-exists="false" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>B64C13/0425</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>for actuating trailing or leading edge flaps, air brakes or spoilers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/0427" definition-exists="false" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>B64C13/0427</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>for actuating trim</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/044" definition-exists="false" ipc-concordant="B64C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/044</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>operated by feet, e.g. pedals</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/06" definition-exists="true" ipc-concordant="B64C13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adjustable to suit individual persons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/08" definition-exists="false" ipc-concordant="B64C13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Trimming zero positions</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/10" definition-exists="true" ipc-concordant="B64C13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising warning devices</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/12" definition-exists="true" ipc-concordant="B64C13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dual control apparatus</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/14" definition-exists="true" ipc-concordant="B64C13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C13/14</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>lockable</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C13/16" definition-exists="true" ipc-concordant="B64C13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>actuated automatically, e.g. responsive to gust detectors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/18" definition-exists="true" ipc-concordant="B64C13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using automatic pilot</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/20" definition-exists="true" ipc-concordant="B64C13/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using radiated signals</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/22" definition-exists="true" ipc-concordant="B64C13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>readily revertible to personal control</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C13/24" definition-exists="true" ipc-concordant="B64C13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitting means</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C13/26" definition-exists="false" ipc-concordant="B64C13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without power amplification or where power amplification is irrelevant</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/28" definition-exists="false" ipc-concordant="B64C13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mechanical</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/30" definition-exists="false" ipc-concordant="B64C13/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cable, chain, or rod mechanisms</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/32" definition-exists="false" ipc-concordant="B64C13/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cam mechanisms</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/34" definition-exists="true" ipc-concordant="B64C13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using toothed gearing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/341" definition-exists="false" ipc-concordant="B64C13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/341</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>having duplication or stand-by provisions</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/343" definition-exists="false" ipc-concordant="B64C13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/343</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>overriding of personal controls; with automatic return to inoperative position</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/345" definition-exists="false" ipc-concordant="B64C13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/345</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>with artificial feel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/36" definition-exists="false" ipc-concordant="B64C13/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>fluid</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C13/38" definition-exists="false" ipc-concordant="B64C13/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with power amplification</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/40" definition-exists="true" ipc-concordant="B64C13/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using fluid pressure</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/42" definition-exists="false" ipc-concordant="B64C13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having duplication or stand-by provisions</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/44" definition-exists="true" ipc-concordant="B64C13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>overriding of personal controls</text></title-part><title-part><text>with automatic return to inoperative position</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/46" definition-exists="true" ipc-concordant="B64C13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with artificial feel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/48" definition-exists="false" ipc-concordant="B64C13/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C13/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the fluid being gaseous</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C13/50" definition-exists="false" ipc-concordant="B64C13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrical energy</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/503" definition-exists="true" ipc-concordant="B64C13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fly-by-Wire</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/504" definition-exists="false" ipc-concordant="B64C13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/504</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>using electro-hydrostatic actuators [EHA&apos;s]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/505" definition-exists="false" ipc-concordant="B64C13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/505</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>having duplication or stand-by provisions</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/506" definition-exists="false" ipc-concordant="B64C13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/506</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>overriding of personal controls; with automatic return to inoperative position</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C13/507" definition-exists="false" ipc-concordant="B64C13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>B64C13/507</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>with artificial feel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C15/00" definition-exists="true" ipc-concordant="B64C15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Attitude, flight direction, or altitude control by jet reaction</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C15/02" definition-exists="true" ipc-concordant="B64C15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the jets being propulsion jets</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C15/12" definition-exists="true" ipc-concordant="B64C15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the power plant being tiltable</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C15/14" definition-exists="true" ipc-concordant="B64C15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the jets being other than main propulsion jets </text><reference><text>jet flaps <class-ref scheme="cpc">B64C9/38</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C17/00" definition-exists="true" ipc-concordant="B64C17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C17/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aircraft stabilisation not otherwise provided for</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C17/02" definition-exists="true" ipc-concordant="B64C17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by gravity or inertia-actuated apparatus</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C17/04" definition-exists="true" ipc-concordant="B64C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by pendular bodies</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C17/06" definition-exists="true" ipc-concordant="B64C17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C17/06</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>by gyroscopic apparatus</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C17/08" definition-exists="true" ipc-concordant="B64C17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C17/08</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>by ballast supply or discharge</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C17/10" definition-exists="true" ipc-concordant="B64C17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transferring fuel to adjust trim</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C19/00" definition-exists="true" ipc-concordant="B64C19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aircraft control not otherwise provided for</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C19/02" definition-exists="false" ipc-concordant="B64C19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conjoint controls</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="B64C21/00" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Influencing air flow over aircraft surfaces, not otherwise provided for</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C21/00" definition-exists="true" ipc-concordant="B64C21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Influencing air flow over aircraft surfaces by affecting boundary layer flow</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C21/00</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64C21/01</class-ref>.<br/>Groups <class-ref scheme="cpc">B64C21/00</class-ref> and <class-ref scheme="cpc">B64C21/01</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C21/01" definition-exists="true" ipc-concordant="B64C21/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/01</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Boundary layer ingestion [BLI] propulsion</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">B64C21/01</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">B64C21/00</class-ref>, <class-ref scheme="cpc">B64C21/025</class-ref>, <class-ref scheme="cpc">B64C21/04</class-ref>, <class-ref scheme="cpc">B64C21/06</class-ref> and <class-ref scheme="cpc">B64C21/08</class-ref>.&#160;<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C21/02" definition-exists="true" ipc-concordant="B64C21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/02</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>by use of slot, ducts, porous areas&#160;or the like</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C21/025" definition-exists="true" ipc-concordant="B64C21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for simultaneous blowing and sucking</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C21/025</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64C21/01</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C21/04" definition-exists="true" ipc-concordant="B64C21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/04</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>for blowing</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">B64C21/04</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">B64C21/08</class-ref>. <br/>Group <class-ref scheme="cpc">B64C21/04</class-ref> is also impacted by reclassification into group <class-ref scheme="cpc">B64C21/01</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C21/06" definition-exists="true" ipc-concordant="B64C21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/06</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>for sucking </text><reference><text>BLI propulsion&#160;<class-ref scheme="cpc">B64C21/01</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">B64C21/06</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">B64C21/08</class-ref>. <br/>Group <class-ref scheme="cpc">B64C21/06</class-ref> is also impacted by reclassification into group <class-ref scheme="cpc">B64C21/01</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C21/08" definition-exists="true" ipc-concordant="B64C21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C21/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adjustable</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C21/08</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64C21/04</class-ref>, <class-ref scheme="cpc">B64C21/06</class-ref> and <class-ref scheme="cpc">B64C21/01</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C21/10" definition-exists="true" ipc-concordant="B64C21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C21/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using other surface properties, e.g. roughness</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C23/00" definition-exists="true" ipc-concordant="B64C23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C23/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Influencing air flow over aircraft surfaces, not otherwise provided for</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C23/005" definition-exists="true" ipc-concordant="B64C23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>B64C23/005</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>by other means not covered by groups <class-ref scheme="cpc">B64C23/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">B64C23/08</class-ref>, e.g. by electric charges, magnetic panels, piezoelectric elements, static charges or ultrasounds</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C23/02" definition-exists="true" ipc-concordant="B64C23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C23/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of rotating members of cylindrical or similar form</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C23/04" definition-exists="true" ipc-concordant="B64C23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C23/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by generating shock waves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C23/06" definition-exists="true" ipc-concordant="B64C23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C23/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by generating vortices</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C23/065" definition-exists="true" ipc-concordant="B64C23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>B64C23/065</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>at the wing tips</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C23/072" definition-exists="false" ipc-concordant="B64C23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>B64C23/072</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>the wing tip airfoil devices being moveable in their entirety</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C23/076" definition-exists="false" ipc-concordant="B64C23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>B64C23/076</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>the wing tip airfoil devices comprising one or more separate moveable members thereon affecting the vortices, e.g. flaps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C23/08" definition-exists="true" ipc-concordant="B64C23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C23/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Magnus effect</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C25/001" definition-exists="false" ipc-concordant="B64C25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>B64C25/001</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Devices not provided for in the groups <class-ref scheme="cpc">B64C25/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">B64C25/68</class-ref></text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C25/003" definition-exists="false" ipc-concordant="B64C25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for reducing landing gear noise, or turbulent flow around it, e.g. landing gear doors used as deflectors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C25/005" definition-exists="false" ipc-concordant="B64C25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tail skids for fuselage tail strike protection on tricycle landing gear aircraft</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C25/006" definition-exists="false" ipc-concordant="B64C25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Landing gear legs comprising torque arms</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C25/008" definition-exists="false" ipc-concordant="B64C25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising means for modifying their length, e.g. for kneeling, for jumping, or for leveling the aircraft</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C25/02" definition-exists="false" ipc-concordant="B64C25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Undercarriages</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/04" definition-exists="true" ipc-concordant="B64C25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement or disposition on aircraft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/06" definition-exists="false" ipc-concordant="B64C25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>fixed</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/08" definition-exists="false" ipc-concordant="B64C25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>non-fixed, e.g. jettisonable</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/10" definition-exists="false" ipc-concordant="B64C25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>retractable, foldable, or the like</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/12" definition-exists="false" ipc-concordant="B64C25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>sideways</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C25/125" definition-exists="false" ipc-concordant="B64C25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>into the fuselage, e.g. main landing gear pivotally retracting into or extending out of the fuselage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/14" definition-exists="false" ipc-concordant="B64C25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>fore-and-aft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/16" definition-exists="true" ipc-concordant="B64C25/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fairings movable in conjunction with undercarriage elements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/18" definition-exists="true" ipc-concordant="B64C25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Operating mechanisms</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="B64C25/20" definition-exists="true" ipc-concordant="B64C25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mechanical</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="B64C25/22" definition-exists="true" ipc-concordant="B64C25/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>fluid</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="B64C25/24" definition-exists="true" ipc-concordant="B64C25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electric</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="B64C25/26" definition-exists="true" ipc-concordant="B64C25/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control or locking systems therefor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="B64C25/28" definition-exists="true" ipc-concordant="B64C25/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with indicating or warning devices</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="B64C25/30" definition-exists="true" ipc-concordant="B64C25/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>emergency actuated</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C25/32" definition-exists="true" ipc-concordant="B64C25/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/32</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>characterised by elements which contact&#160;the ground or similar surface&#160; </text><reference><text>arrester hooks <class-ref scheme="cpc">B64C25/68</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C25/325" definition-exists="false" ipc-concordant="B64C25/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for helicopters</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/34" definition-exists="false" ipc-concordant="B64C25/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wheeled type, e.g. multi-wheeled bogies</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C25/345" definition-exists="false" ipc-concordant="B64C25/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2025/345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-wheel bogies having one or more steering axes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/36" definition-exists="true" ipc-concordant="B64C25/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/36</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangements or adaptations of wheels, tyres or axles in general</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/38" definition-exists="true" ipc-concordant="B64C25/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>B64C25/38</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>endless-track type</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/40" definition-exists="true" ipc-concordant="B64C25/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the elements being rotated before touch-down</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/405" definition-exists="true" ipc-concordant="B64C25/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Powered wheels, e.g. for taxing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/42" definition-exists="true" ipc-concordant="B64C25/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/42</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangement or adaptation of brakes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/423" definition-exists="true" ipc-concordant="B64C25/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Braking devices acting by reaction of gaseous medium </text><reference><text><class-ref scheme="cpc">B64C25/426</class-ref> takes precedence; using rockets <class-ref scheme="cpc">B64D27/023</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/426" definition-exists="true" ipc-concordant="B64C25/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Braking devices providing an automatic sequence of braking</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/44" definition-exists="true" ipc-concordant="B64C25/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Actuating mechanisms</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/445" definition-exists="false" ipc-concordant="B64C25/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Brake regulators for preventing somersaulting</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/46" definition-exists="true" ipc-concordant="B64C25/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/46</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Brake regulators for preventing skidding or aircraft somersaulting</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/48" definition-exists="false" ipc-concordant="B64C25/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>differentially operated for steering purposes</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/50" definition-exists="true" ipc-concordant="B64C25/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/50</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Steerable undercarriages</text></title-part><title-part><text>Shimmy-damping</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/505" definition-exists="true" ipc-concordant="B64C25/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shimmy damping</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/52" definition-exists="true" ipc-concordant="B64C25/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Skis or runners</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/56" definition-exists="true" ipc-concordant="B64C25/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/56</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>inflatable</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/58" definition-exists="true" ipc-concordant="B64C25/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/58</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangements or adaptations of shock-absorbers or springs </text><reference><text>shimmy-dampers <class-ref scheme="cpc">B64C25/50</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/60" definition-exists="true" ipc-concordant="B64C25/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oleo legs</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C25/62" definition-exists="false" ipc-concordant="B64C25/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spring shock-absorbers</text></title-part><title-part><text>Springs</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C25/64" definition-exists="false" ipc-concordant="B64C25/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using rubber or like elements</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C25/66" definition-exists="true" ipc-concordant="B64C25/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C25/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Convertible alighting gear</text></title-part><title-part><text>Combinations of different kinds of ground or like engaging elements</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C25/68" definition-exists="true" ipc-concordant="B64C25/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C25/68</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrester hooks</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="B64C27/00" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Aircraft kinds or components not otherwise provided for</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C27/00" definition-exists="true" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Rotorcraft</text></title-part><title-part><text>Rotors peculiar thereto</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/001" definition-exists="true" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vibration damping devices</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/002" definition-exists="false" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted between the rotor drive and the fuselage</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/003" definition-exists="false" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted on rotor hub, e.g. a rotary force generator</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/004" definition-exists="false" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using actuators, e.g. active systems</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/005" definition-exists="false" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using suspended masses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/006" definition-exists="true" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Safety devices</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/007" definition-exists="false" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for detection of blade cracks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/008" definition-exists="true" ipc-concordant="B64C27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotors tracking or balancing devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/02" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gyroplanes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/021" definition-exists="true" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotor or rotor head construction </text><reference><text>for helicopters <class-ref scheme="cpc">B64C27/32</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/022" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for folding or adjusting the blades</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/023" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Construction of the blades; Coating of the blades</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/024" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for shifting the rotor axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/025" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotor drives, in particular for taking off; Combination of autorotation rotors and driven rotors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/026" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for converting a fixed wing into an autorotation rotor and viceversa</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/027" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control devices using other means than the rotor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/028" definition-exists="false" ipc-concordant="B64C27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Other constructional elements; Rotor balancing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/04" definition-exists="true" ipc-concordant="B64C27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helicopters</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/06" definition-exists="false" ipc-concordant="B64C27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with single rotor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/08" definition-exists="false" ipc-concordant="B64C27/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with two or more rotors</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C27/08</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/10" definition-exists="false" ipc-concordant="B64C27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged coaxially</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C27/10</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/12" definition-exists="false" ipc-concordant="B64C27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotor drives</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C27/125" definition-exists="false" ipc-concordant="B64C27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including toroidal transmissions, e.g. of the CVT type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/14" definition-exists="false" ipc-concordant="B64C27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct drive between power plant and rotor hub</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/16" definition-exists="false" ipc-concordant="B64C27/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drive of rotors by means, e.g. propellers, mounted on rotor blades</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/18" definition-exists="false" ipc-concordant="B64C27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the means being jet-reaction apparatus</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/20" definition-exists="true" ipc-concordant="B64C27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotorcraft characterised by having shrouded rotors, e.g. flying platforms</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C27/20</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref> - <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/22" definition-exists="false" ipc-concordant="B64C27/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/24" definition-exists="false" ipc-concordant="B64C27/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with rotor blades fixed in flight to act as lifting surfaces</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/26" definition-exists="false" ipc-concordant="B64C27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by provision of fixed wings</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/28" definition-exists="true" ipc-concordant="B64C27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with forward-propulsion propellers pivotable to act as lifting rotors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/30" definition-exists="false" ipc-concordant="B64C27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with provision for reducing drag of inoperative rotor</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/32" definition-exists="true" ipc-concordant="B64C27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/32</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Rotors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/322" definition-exists="false" ipc-concordant="B64C27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Blade travel limiting devices, e.g. droop stops</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/325" definition-exists="false" ipc-concordant="B64C27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circulation-control rotors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/327" definition-exists="false" ipc-concordant="B64C27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Retention means relieving the stress from the arm, e.g. tie-bars</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/33" definition-exists="true" ipc-concordant="B64C27/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having flexing arms</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/35" definition-exists="true" ipc-concordant="B64C27/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having elastomeric joints</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/37" definition-exists="true" ipc-concordant="B64C27/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/37</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>having articulated joints</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/39" definition-exists="false" ipc-concordant="B64C27/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with individually articulated blades, i.e. with flapping or drag hinges</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/41" definition-exists="false" ipc-concordant="B64C27/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/41</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>with flapping hinge or universal joint, common to the blades</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/43" definition-exists="false" ipc-concordant="B64C27/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>see-saw type, i.e. two-bladed rotor</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/45" definition-exists="false" ipc-concordant="B64C27/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/45</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a feathering hinge only</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/46" definition-exists="false" ipc-concordant="B64C27/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Blades</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/463" definition-exists="false" ipc-concordant="B64C27/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Blade tips</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/467" definition-exists="true" ipc-concordant="B64C27/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aerodynamic features </text><CPC-specific-text><reference><text><class-ref scheme="cpc">B64C27/463</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/473" definition-exists="true" ipc-concordant="B64C27/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/473</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features </text><CPC-specific-text><reference><text><class-ref scheme="cpc">B64C27/463</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="B64C27/4733" definition-exists="false" ipc-concordant="B64C27/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/4733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotor blades substantially made from particular materials</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/4736" definition-exists="false" ipc-concordant="B64C27/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/4736</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>from composite materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/48" definition-exists="true" ipc-concordant="B64C27/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Root attachment to rotor head</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/50" definition-exists="true" ipc-concordant="B64C27/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Blades foldable to facilitate stowage of aircraft</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/51" definition-exists="true" ipc-concordant="B64C27/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>B64C27/51</classification-symbol><class-title date-revised="2015-11-01"><title-part><text>Damping of blade movements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/52" definition-exists="true" ipc-concordant="B64C27/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/52</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Tilting of rotor bodily relative to fuselage </text><reference><text>of see-saw type construction <class-ref scheme="cpc">B64C27/43</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/54" definition-exists="false" ipc-concordant="B64C27/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/56" definition-exists="true" ipc-concordant="B64C27/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/56</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>characterised by the control initiating means, e.g. manually actuated</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/57" definition-exists="true" ipc-concordant="B64C27/57" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/57</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/58" definition-exists="true" ipc-concordant="B64C27/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/58</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Transmitting means, e.g. interrelated with initiating means or means acting on blades </text><reference><text>means acting on blades <class-ref scheme="cpc">B64C27/72</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/59" definition-exists="false" ipc-concordant="B64C27/59" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/59</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mechanical</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/605" definition-exists="false" ipc-concordant="B64C27/605" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/605</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including swash plate, spider or cam mechanisms</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/615" definition-exists="false" ipc-concordant="B64C27/615" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/615</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including flaps mounted on blades</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/625" definition-exists="false" ipc-concordant="B64C27/625" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/625</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including rotating masses or servo rotors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="B64C27/635" definition-exists="false" ipc-concordant="B64C27/635" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/635</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially for controlling lag-lead movements of blades</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/64" definition-exists="false" ipc-concordant="B64C27/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/64</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>using fluid pressure, e.g. having fluid power amplification</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C27/68" definition-exists="false" ipc-concordant="B64C27/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C27/68</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>using electrical energy, e.g. having electrical power amplification</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/72" definition-exists="true" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means acting on blades</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C27/7205" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on each blade individually, e.g. individual blade control [IBC]</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="B64C27/7211" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>without flaps</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7216" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one actuator per blade</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7222" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using airfoil deformation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7227" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using blowing slots actuated by piezoelectric actuators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7233" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using higher-harmonic control [HHC]</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="B64C27/7238" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by controlling existing swash plate actuators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="B64C27/7244" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using dedicated actuators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/725" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/725</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using jets controlled by piezoelectric actuators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7255" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one or more swash plates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="B64C27/7261" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with flaps</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7266" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>actuated by actuators</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="B64C27/7272" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the electro-hydraulic type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="B64C27/7277" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the magnetostrictive type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="B64C27/7283" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the piezoelectric type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="B64C27/7288" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the memory shape type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="B64C27/7294" definition-exists="false" ipc-concordant="B64C27/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/7294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>actuated mechanically, e.g. by means of linkages</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/78" definition-exists="false" ipc-concordant="B64C27/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in association with pitch adjustment of blades of anti-torque rotor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C27/80" definition-exists="false" ipc-concordant="B64C27/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for differential adjustment of blade pitch between two or more lifting rotors</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C27/82" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C27/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8209" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrically driven tail rotors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8218" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the rotor or the jet axis is inclined with respect to the longitudinal horizontal or vertical plane of the helicopter</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8227" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising more than one rotor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8236" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including pusher propellers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8245" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using air jets</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8254" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shrouded tail rotors, e.g. &quot;Fenestron&quot; fans</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C27/8263" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising in addition rudders, tails, fins, or the like</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C27/8272" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising fins, or movable rudders</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C27/8281" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/8281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising horizontal tail planes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="B64C27/829" definition-exists="false" ipc-concordant="B64C27/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2027/829</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a V-tail units</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C29/00" definition-exists="true" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C29/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft </text><reference><text>rotorcraft <class-ref scheme="cpc">B64C27/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C29/0008" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having its flight directional axis horizontal when grounded</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C29/0016" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the lift during taking-off being created by free or ducted propellers or by blowers</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C29/0025" definition-exists="true" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the propellers being fixed relative to the fuselage</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C29/0033" definition-exists="true" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the propellers being tiltable relative to the fuselage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C29/0041" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the lift during taking-off being created by jet motors</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C29/005" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the motors being fixed relative to the fuselage</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C29/0058" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with vertical jet</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C29/0066" definition-exists="true" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with horizontal jet and jet deflector</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C29/0075" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the motors being tiltable relative to the fuselage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C29/0083" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the lift during taking-off being created by several motors of different type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C29/0091" definition-exists="false" ipc-concordant="B64C29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Accessories not provided for elsewhere</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C29/02" definition-exists="false" ipc-concordant="B64C29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having its flight directional axis vertical when grounded</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C29/04" definition-exists="false" ipc-concordant="B64C29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C29/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by jet-reaction propulsion</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C30/00" definition-exists="true" ipc-concordant="B64C30/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C30/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supersonic-type aircraft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C31/00" definition-exists="true" ipc-concordant="B64C31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C31/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aircraft intended to be sustained without power plant</text></title-part><title-part><text>Powered hang-glider-type aircraft</text></title-part><title-part><text>Microlight-type aircraft</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C31/02" definition-exists="true" ipc-concordant="B64C31/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C31/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gliders, e.g. sailplanes </text><reference><text>hang-gliders <class-ref scheme="cpc">B64C31/028</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C31/024" definition-exists="false" ipc-concordant="B64C31/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C31/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with auxiliary power plant</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C31/028" definition-exists="true" ipc-concordant="B64C31/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C31/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hang-glider-type aircraft</text></title-part><title-part><text>Microlight-type aircraft</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C31/0285" definition-exists="true" ipc-concordant="B64C31/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C31/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Safety devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C31/032" definition-exists="true" ipc-concordant="B64C31/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C31/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having delta shaped wing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C31/036" definition-exists="true" ipc-concordant="B64C31/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C31/036</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>having parachute-type wing</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C31/04" definition-exists="true" ipc-concordant="B64C31/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C31/04</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Man-powered aircraft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C31/06" definition-exists="true" ipc-concordant="B64C31/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C31/06</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Kites </text><reference><text>toy aspects <class-ref scheme="cpc">A63H27/08</class-ref>; airborne towed targets, e.g. kites <class-ref scheme="cpc">F41J9/10</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="B64C31/065" definition-exists="false" ipc-concordant="B64C31/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2031/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of inflatable wing type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C33/00" definition-exists="true" ipc-concordant="B64C33/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C33/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ornithopters</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C33/00</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64U10/40</class-ref>. <br/>Groups <class-ref scheme="cpc">B64C33/00</class-ref> and <class-ref scheme="cpc">B64U10/40</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C33/02" definition-exists="true" ipc-concordant="B64C33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C33/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wings</text></title-part><title-part><text>Actuating mechanisms therefor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C33/025" definition-exists="false" ipc-concordant="B64C33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C33/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the entire wing moving either up or down</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C35/00" definition-exists="true" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C35/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Flying-boats</text></title-part><title-part><text>Seaplanes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C35/001" definition-exists="false" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for increasing stability on the water</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C35/002" definition-exists="false" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using adjustable auxiliary floats</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C35/003" definition-exists="false" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using auxiliary floats at the wing tips</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C35/005" definition-exists="true" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with propellers, rudders or brakes acting in the water</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C35/006" definition-exists="true" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with lift generating devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C35/007" definition-exists="false" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Specific control surfaces therefor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C35/008" definition-exists="true" ipc-concordant="B64C35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C35/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Amphibious sea planes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C37/00" definition-exists="true" ipc-concordant="B64C37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C37/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Convertible aircraft</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C37/02" definition-exists="true" ipc-concordant="B64C37/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C37/02</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Flying units formed by separate aircraft </text><reference><text>towing <class-ref scheme="cpc">B64D3/00</class-ref>; aircraft transported by aircraft <class-ref scheme="cpc">B64D5/00</class-ref>; air-refuelling <class-ref scheme="cpc">B64D39/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C39/00" definition-exists="true" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aircraft not otherwise provided for</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/00</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/001" definition-exists="true" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flying saucers</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/001</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/003" definition-exists="true" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/003</classification-symbol><class-title date-revised="2023-01-01"><title-part><CPC-specific-text><text>with wings, paddle wheels, bladed wheels, moving or rotating in relation to the fuselage </text><reference><text>rotorcraft <class-ref scheme="cpc">B64C27/00</class-ref>; ornithopters <class-ref scheme="cpc">B64C33/00</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/003</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/005" definition-exists="false" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>about a horizontal transversal axis</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/005</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/006" definition-exists="false" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>about a vertical axis</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/006</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/008" definition-exists="false" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>about a longitudinal axis</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/008</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/02" definition-exists="false" ipc-concordant="B64C39/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by special use</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/02</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/022" definition-exists="true" ipc-concordant="B64C39/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tethered aircraft</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/022</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64U10/60</class-ref>. <br/>Groups <class-ref scheme="cpc">B64C39/022</class-ref> and <class-ref scheme="cpc">B64U10/60</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/024" definition-exists="true" ipc-concordant="B64C39/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the remote controlled vehicle type, i.e. RPV</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/024</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/026" definition-exists="true" ipc-concordant="B64C39/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>B64C39/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use as personal propulsion unit</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/028" definition-exists="true" ipc-concordant="B64C39/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/028</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Micro-sized aircraft</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/028</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">B64U10/80</class-ref>. <br/>Groups <class-ref scheme="cpc">B64C39/028</class-ref> and <class-ref scheme="cpc">B64U10/80</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/029" definition-exists="true" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/029</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Asymmetrical aircraft</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">B64C39/029</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">B64U10/00</class-ref> - <class-ref scheme="cpc">B64U10/80</class-ref>, <class-ref scheme="cpc">B64U20/00</class-ref> - <class-ref scheme="cpc">B64U20/98</class-ref>, <class-ref scheme="cpc">B64U30/00</class-ref>, <class-ref scheme="cpc">B64U30/10</class-ref>-<class-ref scheme="cpc">B64U30/16</class-ref>, <class-ref scheme="cpc">B64U30/20</class-ref>-<class-ref scheme="cpc">B64U30/299</class-ref>, <class-ref scheme="cpc">B64U30/30</class-ref>, <class-ref scheme="cpc">B64U30/40</class-ref>, <class-ref scheme="cpc">B64U40/00</class-ref> - <class-ref scheme="cpc">B64U40/20</class-ref>, <class-ref scheme="cpc">B64U50/00</class-ref> - <class-ref scheme="cpc">B64U50/39</class-ref>, <class-ref scheme="cpc">B64U60/00</class-ref> - <class-ref scheme="cpc">B64U60/70</class-ref>, <class-ref scheme="cpc">B64U70/00</class-ref> - <class-ref scheme="cpc">B64U70/99</class-ref> and <class-ref scheme="cpc">B64U80/00</class-ref> - <class-ref scheme="cpc">B64U80/86</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/04" definition-exists="true" ipc-concordant="B64C39/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having multiple fuselages or tail booms</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/06" definition-exists="true" ipc-concordant="B64C39/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having disc- or ring-shaped wings </text><CPC-specific-text><reference><text><class-ref scheme="cpc">B64C39/001</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/062" definition-exists="false" ipc-concordant="B64C39/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having annular wings</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="B64C39/064" definition-exists="true" ipc-concordant="B64C39/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with radial airflow</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/066" definition-exists="true" ipc-concordant="B64C39/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having channel wings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="B64C39/068" definition-exists="true" ipc-concordant="B64C39/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having multiple wings joined at the tips</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/08" definition-exists="true" ipc-concordant="B64C39/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C39/08</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>having multiple wings</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/10" definition-exists="true" ipc-concordant="B64C39/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>All-wing aircraft </text><CPC-specific-text><reference><text><class-ref scheme="cpc">B64C39/001</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C39/105" definition-exists="false" ipc-concordant="B64C39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>B64C2039/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of blended wing body type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="B64C39/12" definition-exists="false" ipc-concordant="B64C39/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C39/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Canard-type aircraft</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="B64C99/00" date-revised="2023-01-01" status="published"><classification-symbol>B64C99/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="B64C99/00" definition-exists="false" ipc-concordant="B64C99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>B64C99/00</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="B64C203/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2203/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flying model aircraft, flying toy aircraft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="B64C211/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2211/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modular constructions of airplanes or helicopters</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="B64C220/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2220/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active noise reduction systems</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="B64C230/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boundary layer controls</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using acoustic waves generated by transducers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by actively generating fluid flow</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by explicitly adjusting fluid flow, e.g. by using valves, variable aperture or slot areas, variable pump action or variable fluid pressure</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by influencing fluid flow by means of surface cavities, i.e. net fluid flow is null</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by influencing fluid flow by heating using other means than combustion</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using electromagnetic tiles, fluid ionizers, static charges or plasma</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>achieving noise reductions</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by blowing other fluids over the surface than air, e.g. He, H, O<sub>2</sub> or exhaust gases</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using small jets that make the fluid flow oscillate</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using a surface having multiple apertures of relatively small openings other than slots</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using passive resonance cavities, e.g. without transducers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using rib lets or hydrophobic surfaces</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="B64C230/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>B64C2230/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at propeller or rotor blades</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme>
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