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Patents > Year filed: 1909 & National tech categories : BE K or FR 6.4

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Tech fields:
airplane (191) · design (98) · LTA (95) · propellers (78) · wings (64) · stability (59) · frame (58) · propulsion (50) · control (48) · Construction (43) · hybrid (42) · None (38) · lift (37) · aerodynamics (36) · navigation (32) · Subsystem (29) · sustentation (26) · rudder (20) · automatic stability (19)
Full specification filed date:
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Supplementary to patent:
None (266) · Patent BE-1909-214032 (21) · Patent FR-1908-392672 (7) · Patent FR-1908-407090 (4) · Patent FR-1907-382794 (3) · Patent ES-1906-38692 (3) · Patent FR-1909-398825 (3) · Patent FR-1908-396470 (2) · Patent FR-1909-405220 (2) · Patent FR-1908-385744 (2) · Patent FR-1908-403132 (2) · Patent BE-1907-202697 (2) · Patent FR-1908-397675 (2)
Related to aircraft:
Patent agent:
None (72) · Armengaud jeune (51) · None (25) · A. Wunderlich & Cie, Ingénieurs-Conseils (21) · J. Bonnet-Thirion (18) · E. Blétry (13) · Weismann et Marx (13) · Lavoix et Mosès (12) · G. de Mestral et F. Harlé (10) · Borame et Julien (10) · Charles Dony (9) · Schwab (9) · C. Baumann (8) · Charles Assi (8) · L. Chassevent (8) · Brandon frères (7) · Y. Rabilloud et fils (7) · C. Blétry (6) · Hippolyte Josse (6) · Émile Klotz (6)
National tech categories: (Click arrow to add another value)
IPCs:
IPC B64C39/00 (52) · None (46) · IPC B64B1/00 (37) · IPC B64C17/00 (34) · IPC B64B1/58 (29) · IPC B64C1/00 (23) · IPC B64C3/38 (21) · IPC B64C23/00 (16) · IPC B64C33/02 (14) · IPC B64C11/00 (13) · IPC B64C33/00 (11) · IPC B64C13/00 (10) · IPC B64C3/00 (10) · IPC B64B1/40 (9) · IPC B64C27/04 (9) · IPC B64C3/52 (8) · IPC B64C35/00 (6) · IPC B64C3/54 (6)
CPCs:
CPC B64C39/00 (50) · CPC B64B1/00 (38) · CPC B64C2700/6295 (36) · CPC B64C17/00 (35) · None (31) · CPC B64B1/58 (29) · CPC B64C3/385 (20) · CPC B64C23/005 (18) · CPC B64C33/02 (15) · CPC B64C13/00 (15) · CPC B64C33/00 (13) · CPC B64C11/006 (11) · CPC B64C2700/6274 (10) · CPC B64C3/00 (10) · CPC B64C2700/6212 (10) · CPC B64C2700/6218 (10) · CPC B64B1/40 (9) · CPC B64C3/52 (8) · CPC B64C3/54 (7) · CPC B64C2700/6233 (7)
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