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Patents > Supplementary to patent : Patent FR-1916-502839 or Patent US-1913-04-21 George Raymond Lawrence or None & Assigned to: None & IPCs : IPC B64C3/18 or IPC B64C39/00 & Number of diagram pages: 1-2

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Tech fields:
airplane (101) · design (62) · frame (56) · construction (46) · Propulsion (41) · None (40) · wings (38) · aerodynamics (28) · stability (28) · propellers (23) · whole (22) · fuselage (19) · control (17) · lift (17) · navigation (15) · monoplane (14) · sustentation (14) · chassis (14) · structure (12) · biplane (12)
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None (63) · None (22) · Armengaud jeune (14) · Marks & Clerk (8) · J. Germain (8) · Weismann et Marx (6) · L. Chassevent (5) · E. Blétry (5) · Dupont et Elluin (5) · Chassevent (5) · Boult, Wade & Tennant (4) · G. de Mestral et F. Harle (4) · Brandon freres (4) · J. Bonnet-Thirion (4) · Munn & Co. (3) · Charles Dony (3) · J. S. Withers & Spooner (3) · H. Bœttcher fils (3) · C. Blétry (3) · Y. Rabilloud et fils (3)
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National tech categories:
FR 6.4 (145) · None (85) · DE 77h.5 (10) · USPC 244/45R (7) · USPC 244/13 (5) · DE 77h.11 (4) · FR 6.3 (4) · FR 6.2 (3) · USPC 244/903 (2) · USPC 244/27 (2) · USPC 52/84 (2) · DE 77 (2) · DE 77h.8 (2)
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CPCs:
CPC B64C39/00 (151) · CPC B64C2700/6295 (142) · CPC B64C39/005 (27) · CPC B64C3/18 (25) · CPC B64C39/08 (24) · CPC B64C3/185 (18) · CPC B64C39/008 (10) · CPC B64C39/003 (7) · CPC B64C39/006 (4) · CPC B64C39/062 (4) · None (3) · CPC Y10S244/903 (2) · CPC B64C3/187 (2)
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