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Patents > Grant date: 1912 & Supplementary to patent : Patent BE-1912-perf Ernest Gérard or None

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US (362) · FR (283) · DE (84) · GB (51) · AT (19) · IT (13) · HU (12) · None (12) · CH (10) · RU (10) · CA (8) · BE (7) · VN (3) · AH (3) · AU (3) · DK (3) · RO (3)
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Tech fields:
None (456) · airplane (144) · stability (82) · Frame (66) · design (59) · propulsion (53) · wings (49) · construction (46) · LTA (45) · navigation (39) · Propellers (36) · propeller (30) · control (27) · subsystem (26) · whole (24) · rudder (23) · safety (22) · aerodynamics (20) · helicopter (19)
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Related to aircraft:
Patent agent:
None (420) · None (34) · Armengaud jeune (25) · L. Chassevent (17) · Victor J. Evans (15) · Charles Dony (13) · Hippolyte Josse (12) · Munn & Co. (12) · Schwab (9) · H. Bœttcher fils (8) · Marks & Clerk (8) · Dupont et Elluin (8) · E. Blétry (7) · Haseltine, Lake & Co. (7) · Boult, Wade & Tennant (6) · J. Germain (5) · J. Bonnet-Thirion (5)
National tech categories:
FR 6.4 (245) · None (200) · HU V/h (21) · USPC 244/80 (17) · USPC 244/90R (16) · USPC 244/45R (15) · USPC 244/22 (14) · USPC 244/35R (12) · AT 77d (11) · USPC 244/48 (10) · USPC 244/93 (10) · USPC 244/76R (9) · USPC 244/6 (8) · FR 6.2 (8) · USPC 244/234 (8) · USPC 244/46 (8) · BE K (8) · USPC 244/87 (8) · USPC 244/231 (7)
IPCs:
None (510) · IPC B64C17/00 (50) · IPC B64C39/00 (46) · IPC B64C1/00 (40) · IPC B64B1/00 (16) · IPC B64C11/00 (15) · IPC B64C3/00 (13) · IPC B64C3/38 (13) · IPC B64C3/56 (12) · IPC B64C25/00 (10) · IPC B64C35/00 (9) · IPC B64B1/58 (8) · IPC CPC B64C13/00 (7) · IPC B64C33/02 (7) · IPC B64D17/00 (7) · IPC B64C11/16 (6) · IPC B64C13/00 (6) · IPC B64C23/00 (6)
First filing:
Citations from after 1930:
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