Drilldown: Patents
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Patents > Full specification filed date:
May 31, 1918
& Application number :
1279516 or
1732817 or
flapping or
propeller
& CPCs :
CPC B64B1/00 or
CPC B64B1/40 or
CPC B64C35/00
& Cites these patents :
Patent FR-1911-438363 or
None
& Number of claims:
4-7
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