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Patents > IPCs : IPC B64C1/00 or IPC B64C39/00 & Number of text pages: 2-9

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Tech fields:
airplane (417) · Stability (315) · design (200) · automatic stability (122) · frame (119) · None (117) · wings (109) · aerodynamics (105) · construction (105) · Control (88) · propulsion (76) · propellers (68) · lift (62) · fuselage (59) · subsystem (49) · equilibrium (47) · rudder (45) · sustentation (44) · Navigation (38) · whole (38)
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None (144) · None (50) · Armengaud jeune (44) · J. Bonnet-Thirion (23) · Boult, Wade & Tennant (20) · Marks & Clerk (18) · E. Blétry (17) · J. Germain (14) · Haseltine, Lake & Co. (13) · Boramé et Julien (13) · Brandon frères (12) · Weismann et Marx (12) · Herbert Haddan & Co. (11) · Dupont et Elluin (11) · Charles Dony (10) · Lavoix et Mosès (10) · L. Chassevent (10) · Y. Rabilloud et fils (9) · Hippolyte Josse (9)
National tech categories:
FR 6.4 (513) · None (246) · DE 77h.5 (19) · USPC 244/45R (14) · FR 6.3 (11) · USPC 244/13 (8) · USPC 244/70 (6) · DE 77h.11 (5) · USPC 244/119 (4) · USPC 244/87 (3) · FR 6.2 (3) · USPC 244/19 (3) · USPC 244/20 (3) · USPC 244/27 (3) · USPC 244/9 (3) · FR 6.1 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C39/00 (275) · CPC B64C17/00 (248) · CPC B64C2700/6295 (240) · CPC B64C2700/6218 (179) · CPC B64C1/00 (75) · CPC B64C17/06 (66) · CPC B64C39/005 (55) · CPC B64C2700/6216 (46) · CPC B64C39/08 (45) · CPC B64C2700/6219 (32) · CPC B64C2700/6228 (29) · CPC B64C39/008 (26) · CPC B64C2001/0063 (25) · CPC B64C39/003 (17) · CPC B64C2001/0081 (14) · CPC B64C2700/6225 (10) · CPC B64C39/006 (10) · CPC B64C1/061 (9) · CPC B64C1/06 (6) · CPC B64C1/08 (5)
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