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Post Info TOPIC: Joseph J. Leray rotorcraft patents


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Joseph J. Leray rotorcraft patents
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The "Helicoplane" from "Helicoplane and allied aircraft" patent, 1933:

https://patents.google.com/patent/US1957277



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More from an earlier 1932 patent:

https://patents.google.com/patent/US1890519



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More 1932-1933 designs found by Hesham, the last one appearing to be an early idea for using lift-fans in the wings:



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