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1771654
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Information
Patent Grant
1771654
References
Source
Patent Number
1,771,654
Date Filed
Not available
Date Issued
Tuesday, July 29, 1930
94 years ago
CPC
B64D35/06 - the propellers or rotors being counter-rotating
B64D2700/62824 - co-rotating
US Classifications
416 - Fluid reaction surfaces
192 - Clutches and power-stop control
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