Drilldown: Patents
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Patents > Office
:
DE
or
GB
& Grant date:
1920 - 1929
& Related to aircraft
:
1909-11-30
or
1911-07-04
or
Yes
& CPCs
:
CPC B64C11/006
or
CPC B64C2700/6256
or
CPC B64C3/00 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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