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1887429
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Information
Patent Grant
1887429
References
Source
Patent Number
1,887,429
Date Filed
Not available
Date Issued
Tuesday, November 8, 1932
92 years ago
CPC
B64D35/06 - the propellers or rotors being counter-rotating
B64D2700/62824 - co-rotating
US Classifications
416 - Fluid reaction surfaces
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