Drilldown: Patents
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Patents > Year filed:
1912
& Year granted:
1910 - 1919
& Full specification filed date:
January 1912
& National tech categories
:
USPC 244/48
or
None
& CPCs:
CPC B64C33/00 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
![](/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)
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