Drilldown: Patents
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Patents > Year granted:
1920
& Filing date:
August 7, 1918
& Grant date:
April 1920
& Publication date:
1900 - 1999
& CPCs:
None
& First filing:
None
& Citations from after 1930:
None ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.