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Patents > CPCs : CPC B64C11/48 or CPC B64C2700/6281 & Number of figures: 4-5

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Office:
Inventors:
Édouard-Jean Bigourdan (2) · Alexis Beurrier (2)
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Applicant person:
None (2) · Alexis Beurrier (2) · Édouard-Jean Bigourdan (2)
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Tech fields:
propeller (10) · helicopter (10) · None (8) · propulsion (7) · propellers (6) · airplane (5) · design (4) · impeller (3) · Frame (3) · hybrid (3) · wings (3)
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None (9)
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Citations from after 1930:
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