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Patents > IPCs : IPC B64C1/00 or IPC B64C3/385 & Number of text pages: 5

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Airplane (22) · stability (20) · automatic stability (10) · wings (7) · design (7) · gyroscope (5) · propellers (4) · subsystem (4) · control (4) · lift (4) · equilibrium (3) · Sustentation (3) · frame (3) · aerodynamics (3) · motors (3)
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