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Patents > IPCs : IPC B64C17/00 or IPC B64C39/00

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Tech fields:
airplane (416) · Stability (401) · Design (194) · automatic stability (170) · None (139) · Frame (119) · Control (114) · wings (107) · aerodynamics (106) · construction (93) · propulsion (84) · propellers (73) · lift (62) · equilibrium (59) · Subsystem (57) · rudder (47) · aeroplane (46) · whole (41) · navigation (41) · sustentation (39)
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Patent agent:
None (210) · None (49) · Armengaud jeune (46) · Marks & Clerk (24) · E. Blétry (24) · J. Bonnet-Thirion (22) · J. Germain (16) · Charles Dony (14) · Weismann et Marx (14) · L. Chassevent (13) · Matray frères et Cie (13) · Lavoix et Mosès (12) · Haseltine, Lake & Co. (12) · Boramé et Julien (12) · Brandon freres (10) · Boult, Wade & Tennant (10) · Dupont et Elluin (10) · P. Follin (9) · Abel & Imray (9) · Herbert Haddan & Co. (9)
National tech categories:
FR 6.4 (590) · None (265) · FR 6.3 (14) · USPC 244/80 (14) · USPC 244/45R (14) · DE 77h.5 (13) · USPC 244/13 (11) · USPC 244/70 (6) · FR 6.2 (5) · USPC 244/9 (4) · USPC 244/27 (4) · DE 77h.11 (4) · USPC 244/20 (4) · USPC 244/87 (3) · USPC 244/19 (3) · USPC 244/93 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C17/00 (496) · CPC B64C39/00 (293) · CPC B64C2700/6295 (287) · CPC B64C2700/6218 (192) · CPC B64C2700/6212 (109) · CPC B64C2700/6214 (67) · CPC B64C39/005 (63) · CPC B64C39/08 (41) · CPC B64C2700/6219 (38) · CPC B64C39/008 (26) · CPC B64C39/003 (18) · CPC B64C2700/6215 (16) · CPC B64C39/006 (12) · CPC B64C2700/6211 (7) · CPC B64C1/00 (6) · CPC B64C39/062 (4) · CPC B64C3/385 (3) · CPC B64C39/06 (3) · None (3) · CPC B64C3/48 (3)
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Citations from after 1930:
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