Drilldown: Patents
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Patents > Year filed:
1890 - 1899
& Office
:
DE
or
UN
& Related to aircraft:
Yes
& National tech categories
:
DE 77h.5
or
None
& Number of text pages:
None ![](/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)
![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 8 results in range #1 to #8.