Drilldown: Patents
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Patents > Grant date:
1890 - 1899
& Related to aircraft:
Yes
& National tech categories
:
USPC 244/30
or
USPC 244/45R
or
USPC 244/90R ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 3 results in range #1 to #3.