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Patents > IPCs : IPC B64C17/00 or IPC B64C33/02 & Number of text pages: 3-4

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stability (145) · airplane (119) · automatic stability (64) · Design (45) · control (36) · None (32) · wings (29) · frame (26) · Aerodynamics (25) · equilibrium (21) · subsystem (18) · flapping (16) · rudder (15) · construction (15) · propulsion (13) · ornithopter (12) · navigation (12) · steering (11) · Lift (10) · pendulum (10)
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None (166) · Patent DE-1911-11-16 Otto Albin Budig (3) · Patent US-1908-989022 (2) · Patent DE-1910-243485 (2) · Patent IT-1910-10-17 Carlo Navaro (2) · Patent FR-1914-476300 (2) · Patent FR-1912-450608 (2) · Patent FR-1910-414892 (2) · Patent FR-1912-442419 (2) · Patent US-1911-1030764 (2) · Patent US-1910-999125 (2)
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None (38) · Armengaud jeune (18) · None (14) · E. Blètry (9) · Marks & Clerk (7) · Herbert Haddan & Co. (6) · J. Bonnet-Thirion (5) · J. Germain (5) · L. Chassevent (5) · Dom. Casalonga (5) · Lavoix et Mosès (5) · Boult, Wade & Tennant (5) · Weismann et Marx (5) · Hippolyte Josse (4) · Rigot et Prévost (4)
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