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Patents > National tech categories : FR 6.4 or USPC 244/45R & Number of figures: 3

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Tech fields:
airplane (184) · design (77) · stability (77) · frame (63) · propulsion (54) · Construction (51) · None (45) · propellers (43) · LTA (40) · wings (36) · control (33) · aerodynamics (30) · hybrid (29) · landing (27) · automatic stability (27) · navigation (25) · subsystem (25) · lift (24) · sustentation (24) · helicopter (20)
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Supplementary to patent:
None (270) · Patent BE-1911-04-14 Lucien-Constant-Joseph Harel (2) · Patent FR-1909-410140 (2) · Patent FR-1911-430799 (2) · Patent FR-1909-398825 (2) · Patent DE-1911-11-16 Otto Albin Budig (2) · Patent FR-1910-414695 (2)
Related to aircraft:
Patent agent:
None (41) · Armengaud jeune (29) · None (28) · Charles Dony (16) · J. Bonnet-Thirion (15) · L. Chassevent (15) · E. Blétry (15) · Weismann et Marx (14) · J. Germain (12) · G. de Mestral et F. Harlé (11) · Hippolyte Josse (9) · Schwab (9) · Dupont et Elluin (9) · Chassevent (8) · Boramé et Julien (8) · Lavoix et Mosès (8) · Emile Bert (7) · M. Zerolo (7) · P. Follin (6)
National tech categories: (Click arrow to add another value)
IPCs:
IPC B64C17/00 (49) · IPC B64C39/00 (47) · IPC B64C1/00 (42) · IPC B64C23/00 (23) · IPC B64C35/00 (19) · IPC B64C3/38 (18) · IPC B64B1/00 (18) · IPC B64C11/00 (16) · None (16) · IPC B64C3/00 (14) · IPC B64C25/00 (12) · IPC B64C13/00 (12) · IPC B64C33/02 (10) · IPC B64B1/58 (10) · IPC B64D17/00 (7) · IPC B64C3/54 (6) · IPC B64C11/04 (6) · IPC B64C27/04 (6) · IPC B64C13/04 (6) · IPC B64C11/20 (6)
CPCs:
CPC B64C17/00 (48) · CPC B64C39/00 (34) · CPC B64C2700/6295 (31) · CPC B64C23/005 (22) · CPC B64B1/00 (17) · CPC B64C3/385 (16) · CPC B64C2700/6274 (16) · CPC B64C35/00 (15) · CPC B64C2700/6218 (15) · CPC B64C13/00 (15) · CPC B64C3/00 (15) · CPC B64C11/006 (14) · CPC B64C2700/6256 (11) · CPC B64C33/02 (10) · CPC B64B1/58 (10) · CPC B64C25/06 (10) · CPC B64C25/62 (8) · CPC B64C2700/6219 (8) · CPC B64C1/00 (8)
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