Drilldown: Patents
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Patents > Office
:
DE
or
RU
& Supplementary to patent:
Patent FR-1909-420322
& National tech categories
:
DE 77h.5
or
None
& CPCs
:
CPC B64C2700/6295
or
CPC B64C3/00
& Number of text pages:
2 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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