Drilldown: Patents
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Patents > Office
:
AH
or
DE
or
GR
& Supplementary to patent:
None
& National tech categories:
DE 77
& CPCs
:
CPC B64C23/005
or
CPC B64C2700/6235
or
CPC B64C2700/6295
or
None
& Number of text pages:
None ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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