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Patents > CPCs : CPC B21D39/04 or CPC B64C2700/6212 or CPC B64C2700/6274

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None (180) · stability (67) · airplane (56) · control (26) · automatic stability (21) · propellers (18) · Design (17) · propulsion (17) · steering (16) · helicopter (14) · subsystem (13) · Frame (12) · Hybrid (11) · construction (11) · Ascension (11) · lift (10) · pendulum (9) · Navigation (8) · equilibrium (7) · whole (7)
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None (260) · Patent FR-1908-396249 (5) · Patent DE-1909-220044 (2) · Patent US-1914-1169695 (2) · Patent US-1908-989022 (2) · Patent FR-1915-525800 (2) · Patent FR-1914-476300 (2) · Patent FR-1909-410140 (2) · Patent FR-1908-407090 (2) · Patent FR-1908-394254‎ (2) · Patent DE-1910-06-18 Carl Hanschke (2) · Patent US-1915-1149680 (2) · Patent AT-1909-40038 (2)
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Patent agent:
None (130) · None (14) · E. Blètry (9) · J. Germain (9) · Matray frères et Cie (9) · Armengaud jeune (6) · Hippolyte Josse (5) · L. Chassevent (5) · Boramé et Julien (5) · Paul Caquet (4) · J. Bonnet-Thirion (4) · Herbert Haddan & Co. (4) · G. de Mestral et F. Harlé (4) · Schwab (4)
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