Drilldown: Patents
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Patents > Office
:
CU
or
DE
& IPCs
:
IPC B64C3/18
or
IPC B64C35/00
& CPCs
:
CPC B64C2700/6256
or
CPC B64C35/00
& Family year:
1918 ![](/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)
Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.