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Patents > IPCs : IPC B64C11/34 or IPC B64C23/00 or IPC B64C33/00

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None (272) · Seine (10) · Seine-et-Oise (4) · Nord (4) · Paris (3) · Aisne (3) · California (2) · Villers-Cotterêts (2) · Pennsylvania (2) · Maine-et-Loire (2) · Indiana (2) · Gironde (2) · Charente (2) · London (2)
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None (87) · airplane (79) · propulsion (57) · hybrid (47) · design (40) · flapping (39) · frame (34) · wings (33) · ornithopter (32) · propellers (32) · stability (31) · lift (29) · helicopter (26) · propeller (26) · navigation (24) · Ascension (23) · Control (18) · construction (18) · sustentation (16) · aerodynamics (16)
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Supplementary to patent:
None (255) · Patent FR-1909-410140 (5) · Patent AT-1912-75092 (3) · Patent GB-1913-4191 (2) · Patent AT-1909-40038 (2) · Patent FR-1908-407090 (2) · Patent FR-1915-525800 (2) · Patent DE-1910-06-18 Carl Hanschke (2) · Patent DE-1909-220044 (2) · Patent FR-1909-404954 (2)
Related to aircraft:
Patent agent:
None (70) · None (27) · Armengaud jeune (10) · E. Bletry (8) · G. de Mestral et F. Harlé (7) · W. P. Thompson & Co. (7) · J. Bonnet-Thirion (6) · Schwab (5) · Chassevent (5) · Weismann et Marx (4) · Marks & Clerk (4) · C. Blétry (4) · C. Bauman (4) · Paul Caquet (4)
National tech categories:
FR 6.4 (180) · None (101) · USPC 244/22 (13) · USPC 244/11 (7) · DE 77h.6 (6) · FR 6.3 (6) · DE 77 (4) · USPC 244/6 (3) · DE 77h.5 (3) · USPC 244/63 (2) · USPC 244/64 (2) · USPC 244/66 (2) · USPC 244/72 (2) · DE 77h.10 (2)
IPCs: (Click arrow to add another value)
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