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Patents > IPCs : IPC B64C1/00 or IPC B64C39/00 & First filing: Yes

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Tech fields:
airplane (218) · stability (198) · None (101) · design (92) · automatic stability (80) · Wings (64) · Control (55) · aerodynamics (53) · Frame (52) · Propulsion (50) · Construction (47) · fuselage (38) · Propellers (33) · lift (28) · navigation (27) · subsystem (25) · Whole (24) · Sustentation (22) · rudder (21) · equilibrium (21)
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Supplementary to patent:
None (520) · Patent FR-1916-502839 (2) · Patent FR-1910-435648 (2) · Patent FR-1913-465942 (2) · Patent FR-1914-475066 (2)
Related to aircraft:
Patent agent:
None (115) · None (47) · Armengaud jeune (26) · J. Bonnet-Thirion (12) · Boult, Wade & Tennant (11) · Marks & Clerk (10) · L. Chassevent (9) · J. Germain (9) · Charles Dony (8) · E. Blétry (8) · Chassevent (7) · Weismann et Marx (7) · de Bongé (7) · Haseltine, Lake & Co. (7)
National tech categories:
FR 6.4 (306) · None (179) · DE 77h.5 (15) · USPC 244/45R (14) · USPC 244/13 (9) · USPC 244/119 (7) · DE 77h.11 (5) · USPC 244/27 (4) · USPC 244/70 (4) · FR 6.3 (4) · FR 6.1 (3) · USPC 244/20 (3) · USPC 244/87 (3) · USPC 244/9 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C17/00 (164) · CPC B64C39/00 (163) · CPC B64C2700/6295 (162) · CPC B64C2700/6218 (121) · CPC B64C1/00 (57) · CPC B64C39/005 (43) · CPC B64C17/06 (40) · CPC B64C39/08 (39) · CPC B64C2700/6216 (25) · CPC B64C2700/6219 (22) · CPC B64C39/008 (21) · CPC B64C2700/6228 (20) · CPC B64C2001/0063 (17) · CPC B64C2001/0081 (12) · CPC B64C2700/6225 (10) · CPC B64C39/003 (8) · CPC B64C39/006 (7) · CPC B64C17/04 (5) · CPC B64C1/06 (5)
First filing: (Click arrow to add another value)
Citations from after 1930:
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