Drilldown: Patents
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Patents > IPCs
:
IPC B64C11/00
or
IPC B64C17/00
or
IPC B64C3/38
or
IPC B64C33/02
& CPCs
:
CPC B64C2700/6274
or
CPC B64C2700/6295
& First filing:
Yes
& Citations from after 1930:
5 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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