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1434620
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Information
Patent Grant
1434620
References
Source
Patent Number
1,434,620
Date Filed
Not available
Date Issued
Tuesday, November 7, 1922
102 years ago
CPC
B64D35/06 - the propellers or rotors being counter-rotating
B64D2700/62824 - co-rotating
Y10T74/19121 - Concentric
US Classifications
416 - Fluid reaction surfaces
074 - Machine element or mechanism
475 - Planetary gear transmission systems or components
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