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Patents > Grant date: 1910 - 1919 & IPCs : IPC B64C27/04 or IPC B64D7/04

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Inventors:
None (3) · Edmond-Louis Douhéret (3) · Alexis Beurrier (3) · Édouard-Jean Bigourdan (3) · Jesse James Dillon (2) · Charles Wolf (2)
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Applicant person:
Edmond-Louis Douhéret (3) · Alexis Beurrier (3) · None (2) · Jesse James Dillon (2) · Charles Wolf (2) · Édouard-Jean Bigourdan (2)
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Tech fields:
helicopter (26) · propulsion (13) · hybrid (13) · propellers (10) · design (10) · Airplane (8) · ascension (8) · None (7) · lift (6) · sustentation (5) · frame (4) · propeller (4) · HTA (4) · heavier-than-air (4) · wings (4) · construction (4) · control (4) · Helicoplane (3) · gyroscope (3) · stability (3)
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