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Patents > IPCs : IPC B64C3/38 or IPC B64C39/00 & First filing: Yes

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Tech fields:
airplane (115) · None (73) · design (51) · wings (50) · propulsion (49) · stability (46) · frame (44) · control (34) · navigation (32) · construction (31) · aeroplane (27) · whole (24) · aerodynamics (24) · propellers (23) · lift (20) · airfoil (17) · fuselage (16) · LTA (15) · Monoplane (13)
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None (84) · None (21) · Armengaud jeune (13) · Marks & Clerk (8) · Haseltine, Lake & Co. (7) · L. Chassevent (7) · Munn & Co. (7) · J. Germain (6) · J. Bonnet-Thirion (6) · Weismann et Marx (6) · Boult, Wade & Tennant (5) · Chassevent (5) · Dupont et Elluin (4) · Lavoix et Mosès (4) · Charles Dony (4) · C. Blétry (4) · E. Blétry (4)
National tech categories:
FR 6.4 (162) · None (121) · USPC 244/45R (14) · USPC 244/13 (10) · USPC 244/48 (9) · DE 77h.5 (8) · USPC 244/20 (4) · USPC 244/9 (4) · DE 77h.11 (4) · USPC 244/70 (4) · USPC 244/90R (4) · USPC 244/27 (4) · USPC 244/119 (3) · FR 6.3 (3) · DE 77 (3) · USPC 244/87 (3) · USPC 244/234 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C2700/6295 (178) · CPC B64C39/00 (163) · CPC B64C3/385 (62) · CPC B64C39/005 (42) · CPC B64C39/08 (35) · CPC B64C39/008 (19) · CPC B64C3/38 (15) · CPC B64C39/006 (7) · CPC B64C39/003 (7) · None (5) · CPC B64C39/062 (4) · CPC Y02T50/145 (4) · CPC B64C3/42 (3) · CPC B64C2700/6242 (3)
First filing: (Click arrow to add another value)
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