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Patents > IPCs : IPC B64C27/04 or IPC B64D7/04 & Number of diagram pages: 1-2

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Office:
Inventors:
None (3) · Alexis Beurrier (3) · Désiré Sival (3) · Edmond-Louis Douhéret (3) · Édouard-Jean Bigourdan (3) · Jules Collomb (2) · Félix Monin (2) · Charles Wolf (2) · Paul Cornu (2) · Jules Cornu (2) · Louis Lacoin (2)
Inventor country:
Applicant person:
None (3) · Edmond-Louis Douhéret (3) · Désiré Sival (3) · Alexis Beurrier (3) · Jules Cornu (2) · Paul Cornu (2) · Jules Collomb (2) · Charles Wolf (2) · Félix Monin (2) · Louis Lacoin (2)
Applicant is inventor:
Tech fields:
helicopter (39) · propellers (18) · hybrid (17) · propulsion (16) · airplane (15) · ascension (13) · None (10) · design (9) · Lift (6) · heavier-than-air (6) · frame (5) · sustentation (5) · propeller (5) · wings (5) · control (4) · descent (4) · construction (4)
Full specification filed date:
Application number:
None (3)
Granted:
Related to aircraft:
Patent agent:
None (13) · None (7) · Armengaud jeune (5) · J. Germain (5) · Marks & Clerk (3) · Y. Rabilloud et fils (3) · G. Petiau (2) · C. Blétry (2) · Schwab (2) · J. S. Withers & Spooner (2) · J. Fayollet (2) · Browne & Co. (2) · Lavoix et Mosès (2) · G. de Mestral et F. Harlé (2)
National tech categories:
IPCs: (Click arrow to add another value)
First filing:
Citations from after 1930:
Number of text pages:
Number of claims:
Number of diagram pages:

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