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Patents > CPCs : CPC B63H1/36 or CPC B64C33/02 or CPC B64C39/00

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Tech fields:
None (500) · airplane (131) · frame (100) · flapping (96) · propulsion (76) · design (74) · wings (65) · ornithopter (57) · stability (42) · navigation (38) · construction (36) · propellers (33) · Whole (30) · lift (28) · Control (27) · propeller (26) · hybrid (24) · airfoil (24) · rudder (23) · LTA (22)
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Supplementary to patent:
None (680) · Patent FR-1912-446040 (4) · Patent US-1910-996592 (3) · Patent GB-1909-12556 (3) · Patent FR-1916-502839 (3) · Patent BE-1910-12-28-Muehter (3)
Related to aircraft:
Patent agent:
None (421) · None (35) · Armengaud jeune (23) · Marks & Clerk (13) · Weismann et Marx (10) · J. Bonnet-Thirion (9) · E. Blétry (9) · J. Germain (8) · Chassevent (8) · Brandon frères (8) · Charles Assi (7) · Boult, Wade & Tennant (7) · Y. Rabilloud et fils (7) · Ad. Sturm (6) · Dupont et Elluin (6) · C. Blétry (6) · Schwab (6) · Munn & Co. (6) · G. de Mestral et F. Harlé (6) · Boramé et Julien (6)
National tech categories:
None (385) · FR 6.4 (315) · USPC 244/22 (71) · DE 77h.10 (22) · USPC 244/72 (20) · DE 77 (15) · FR 6.3 (14) · DE 77h.5 (6) · FR 6.2 (6) · DE 77h (4) · USPC 244/13 (4) · USPC 244/64 (3)
CPCs: (Click arrow to add another value)
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