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Patents > IPCs : IPC A63G31/00 or IPC B64C13/00 & First filing: No

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control (29) · airplane (28) · Rudder (10) · steering (10) · Design (9) · wings (8) · frame (8) · lift (6) · stability (6) · Aerodynamics (5) · navigation (5) · subsystem (5) · None (4) · construction (3) · Monoplane (3)
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