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Patents > IPCs : IPC B64C11/00 or IPC B64C13/00 or IPC B64C30/00

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Supplementary to patent:
None (248) · Patent FR-1910-417989 (3) · Patent DE-1911-10-19 Vincent Wisniewski and-or Luftschiffsantrieb Gesellschaft mit Beschränkter Haftung (2) · Patent IT-1916-05-16 (2) · Patent FR-1909-410848 (2) · Patent DE-1918-388537 (2) · Patent DE-1912-267069 (2) · Patent US-1913-1118124 (2)
Related to aircraft:
Patent agent:
None (93) · Armengaud jeune (17) · None (12) · Marks & Clerk (10) · Boult, Wade & Tennant (8) · Weismann et Marx (8) · Brewer & Son (6) · Y. Rabilloud et fils (6) · J. Bonnet-Thirion (6) · Dom. Casalonga (6) · E. Blétry (5) · H. Bœttcher fils (4) · Brierley & Howard (4) · Paul Blum (4) · Abel & Imray (4) · W. P. Thompson & Co. (4) · Lloyd Wise & Co. (4)
National tech categories:
FR 6.4 (137) · None (110) · DE 77h.5 (18) · FR 6.2 (11) · FR 6.3 (7) · USPC 244/233 (6) · USPC 416/139 (5) · USPC 244/234 (5) · USPC 244/231 (5) · USPC 244/15 (4) · DE 77h.6 (4) · USPC 244/87 (3) · USPC 244/237 (3) · DE 62b.15 (3)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C13/00 (156) · CPC B64C11/006 (98) · CPC B64C2700/6256 (95) · CPC B64C11/00 (48) · CPC B64C11/001 (12) · CPC B64D2700/62692 (10) · CPC B64C11/005 (10) · CPC B64C2700/6259 (7) · CPC B64C11/346 (5) · CPC B64C30/00 (4) · CPC B64C11/007 (4) · None (3)
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Citations from after 1930:
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