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Patents > National tech categories: FR 6.4 & IPCs : IPC B64C19/00 or IPC B64C27/04

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Office:
Inventors:
Désiré Sival (3) · Édouard-Jean Bigourdan (2) · Jules Collomb (2) · Edwin Richard Mumford (2) · Émile Dupont (2) · Félix Monin (2) · Edmond-Louis Douhéret (2) · Charles Wolf (2) · Alexis Beurrier (2)
Inventor country:
Applicant person:
Désiré Sival (3) · Charles Wolf (2) · Jules Collomb (2) · Edwin Richard Mumford (2) · Alexis Beurrier (2) · Émile Dupont (2) · Félix Monin (2) · Edmond-Louis Douhéret (2)
Applicant type:
Applicant is inventor:
Tech fields:
helicopter (30) · propellers (15) · airplane (14) · propulsion (14) · ascension (11) · hybrid (10) · design (8) · None (6) · wings (6) · sustentation (5) · Lift (5) · frame (5) · heavier-than-air (4) · propeller (3) · parachutes (3) · HTA (3) · construction (3) · descent (3)
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IPCs: (Click arrow to add another value)
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Cites these patents:
Citations from after 1930:
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