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Patents > IPCs : IPC B64C1/00 or IPC B64C27/04 & Number of claims: 7-8

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stability (16) · airplane (16) · automatic stability (6) · None (5) · gyroscope (3) · fuselage (3) · design (2) · safety (2) · propellers (2) · navigation (2) · aerodynamics (2) · Helicopter (2) · equilibrium (2) · landing (2) · wings (2) · braking (2) · construction (2)
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