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Patents > IPCs : IPC B64C27/04 or IPC B64C39/00 & First filing: Yes

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Tech fields:
airplane (109) · None (78) · propulsion (55) · Design (53) · wings (42) · helicopter (40) · stability (40) · frame (33) · propellers (30) · control (25) · Construction (24) · navigation (23) · aerodynamics (22) · Whole (22) · lift (20) · hybrid (15) · LTA (14) · heavier-than-air (13) · sustentation (13) · fuselage (13)
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Patent agent:
None (78) · None (29) · Armengaud jeune (19) · Marks & Clerk (11) · J. Germain (8) · Munn & Co. (6) · Lavoix et Mosès (6) · L. Chassevent (6) · J. Bonnet-Thirion (6) · Y. Rabilloud et fils (6) · Weismann et Marx (5) · J. S. Withers & Spooner (5) · Haseltine, Lake & Co. (5) · Dupont et Elluin (5) · C. Blétry (5) · Brandon frères (5)
National tech categories:
FR 6.4 (173) · None (121) · USPC 244/45R (14) · USPC 244/13 (9) · DE 77h.5 (6) · FR 6.3 (6) · DE 77h.11 (5) · USPC 244/70 (4) · USPC 244/27 (4) · DE 77 (4) · DE 77h.6 (3) · USPC 244/9 (3) · USPC 244/20 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C39/00 (163) · CPC B64C2700/6295 (162) · CPC B64C2700/6281 (57) · CPC B64C39/005 (43) · CPC B64C39/08 (39) · CPC B64C27/04 (38) · CPC B64C39/008 (21) · CPC B64C27/12 (13) · CPC B64C27/20 (9) · CPC B64C39/003 (8) · CPC B64C39/006 (7) · CPC B64C39/06 (5) · CPC B64C27/52 (5) · CPC B64C39/062 (4) · None (3) · CPC B64C3/385 (3) · CPC B64C3/42 (3)
First filing: (Click arrow to add another value)
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