Drilldown: Patents
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Patents > Office
:
BE
or
CA
or
US
& National tech categories
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HU V/h
or
USPC 244/80
& IPCs
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IPC B64C17/00
or
IPC F02N5/00
& CPCs:
CPC B64C17/00
& Family year:
1911 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 2 results in range #1 to #2.