Drilldown: Patents
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Patents > Supplementary to patent:
Patent DE-1891-64557
& Related to aircraft
:
Jan 15, 1908
or
Yes
& National tech categories
:
USPC 244/153R
or
USPC 244/3.23
or
USPC 244/80
& IPCs:
IPC B64C31/00 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.