Drilldown: Patents
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Patents > Grant date:
1920 - 1929
& Related to aircraft
:
1
or
DE 369478
or
marine
& National tech categories
:
DE 77h
or
FR 6.2
or
HU V/h
or
USPC 244/80
& Number of claims:
5 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.