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Patents > IPCs: IPC B64C27/04 & Number of claims: 3-40

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None (3) · Alexis Beurrier (2) · Édouard-Jean Bigourdan (2)
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None (4) · Alexis Beurrier (2) · Édouard-Jean Bigourdan (2)
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Tech fields:
helicopter (20) · propulsion (11) · airplane (8) · hybrid (7) · None (6) · ascension (6) · Propellers (6) · propeller (5) · Lift (5) · sustentation (4) · design (3) · heavier-than-air (3) · HTA (3) · stability (3)
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