Drilldown: Patents
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- Airplane (18)
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- Letters (683)
- Organizations (967)
- Patents (17619)
- Person (2162)
- Publications (24571)
- Techtypes (2388)
Patents > Year granted:
1924
& Office
:
DE
or
RU
& Supplementary to patent:
None
& National tech categories
:
DE 77h.5
or
None
& CPCs
:
CPC B64C2700/6235
or
CPC B64C2700/6295
or
CPC B64C3/00 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.