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Patents > Filing date: 1900 - 1999 & IPCs : IPC B64C23/00 or IPC B64C33/02

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Tech fields:
airplane (86) · Propulsion (67) · None (56) · flapping (56) · design (49) · wings (47) · hybrid (42) · frame (38) · propellers (35) · navigation (29) · Ascension (27) · ornithopter (26) · helicopter (25) · construction (24) · stability (24) · lift (23) · Control (22) · propeller (19) · aerodynamics (19) · sustentation (18)
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Supplementary to patent:
None (211) · Patent FR-1909-410140 (5) · Patent FR-1912-446040 (4) · Patent BE-1910-12-28-Muehter (3) · Patent FR-1915-525800 (2) · Patent FR-1909-420004 (2) · Patent FR-1909-404954 (2) · Patent FR-1908-394254 (2) · Patent DE-1910-09-03 Richard Blum (2) · Patent DE-1910-06-18 Carl Hanschke (2) · Patent DE-1909-220044 (2) · Patent FR-1908-407090 (2) · Patent AT-1909-40038 (2)
Related to aircraft:
Patent agent:
None (68) · None (22) · Schwab (7) · Armengaud jeune (7) · Ad. Sturm (6) · Rigot et Prévost (6) · C. Blétry (6) · G. de Mestral et F. Harle (6) · Marks & Clerk (6) · J. Germain (5) · Chassevent (5) · E. Blétry (5) · A. de Carsalade (5) · Hippolyte Josse (4) · Paul Caquet (4) · J. Bonnet-Thirion (4) · Boramé et Julien (4) · Matray frères et Cie (4)
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Cites these patents:
None (320)
Citations from after 1930:
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