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Patents > National tech categories: FR 6.4 & IPCs : IPC B64C27/04 or IPC B64C37/00

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Office:
Inventors:
Désiré Sival (3) · Edmond-Louis Douhéret (3) · Heinrich Bauer (2) · Edwin Richard Mumford (2) · Jules Cornu (2) · Émile Dupont (2) · Jules Collomb (2) · Félix Monin (2) · Paul Cornu (2) · Charles Wolf (2) · Édouard-Jean Bigourdan (2) · Alexis Beurrier (2)
Inventor country:
Applicant person:
Edmond-Louis Douhéret (3) · Désiré Sival (3) · Heinrich Bauer (2) · Edwin Richard Mumford (2) · Jules Collomb (2) · Émile Dupont (2) · Félix Monin (2) · Charles Wolf (2) · Jules Cornu (2) · Alexis Beurrier (2)
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Tech fields:
helicopter (31) · propellers (17) · airplane (15) · Propulsion (14) · hybrid (13) · ascension (11) · design (8) · None (8) · wings (6) · sustentation (5) · lift (5) · heavier-than-air (4) · Frame (4) · parachutes (3) · helicoplane (3) · construction (3) · descent (3)
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IPCs: (Click arrow to add another value)
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Citations from after 1930:
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