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Patents > IPCs : IPC B61C9/22 or IPC B64C3/38 or IPC B64C39/00

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Tech fields:
Airplane (282) · Design (152) · None (149) · frame (101) · wings (100) · propulsion (89) · stability (86) · construction (77) · control (66) · propellers (65) · aerodynamics (60) · lift (53) · navigation (49) · whole (42) · sustentation (39) · fuselage (35) · rudder (30) · chassis (27) · airfoil (26) · HTA (26)
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Supplementary to patent:
None (455) · Patent FR-1916-502839 (4) · Patent FR-1908-392672 (4) · Patent US-1916-1208684 (3) · Patent US-1910-996592 (3) · Patent BE-1912-02-07-Gramaticesco (3) · Patent FR-1912-449167 (3)
Related to aircraft:
Patent agent:
None (135) · None (42) · Armengaud jeune (32) · Marks & Clerk (18) · J. Bonnet-Thirion (16) · E. Blétry (13) · J. Germain (11) · Boult, Wade & Tennant (11) · Weismann et Marx (11) · Y. Rabilloud et fils (10) · L. Chassevent (9) · Brandon frères (8) · Haseltine, Lake & Co. (8) · Charles Assi (8) · Boramé et Julien (8) · Munn & Co. (7) · Dupont et Elluin (7) · J. S. Withers & Spooner (7) · G. de Mestral et F. Harle (7)
National tech categories:
FR 6.4 (369) · None (206) · DE 77h.5 (17) · USPC 244/45R (14) · FR 6.3 (11) · USPC 244/13 (10) · USPC 244/48 (8) · USPC 244/70 (6) · DE 77h.11 (6) · USPC 244/234 (4) · USPC 244/90R (4) · FR 6.2 (4) · USPC 244/27 (4) · USPC 244/20 (3) · DE 77 (3) · AT 77d (3) · USPC 244/19 (3) · USPC 244/9 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C39/00 (304) · CPC B64C2700/6295 (265) · CPC B64C3/385 (154) · CPC B64C39/005 (65) · CPC B64C39/08 (48) · CPC B64C39/008 (29) · CPC B64C3/38 (25) · CPC B64C39/003 (20) · CPC B64C39/006 (12) · None (6) · CPC B64C3/42 (5) · CPC Y02T50/145 (5) · CPC B64C39/062 (4) · CPC B64C39/06 (4) · CPC Y02T50/10 (3) · CPC B64C17/00 (3) · CPC B64C39/068 (3) · CPC B64C3/56 (3) · CPC B64C2700/6242 (3)
First filing:
Citations from after 1930:
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