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Patents > IPCs : IPC B64C25/00 or IPC B64C3/52 & Number of claims: 6-40

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Airplane (10) · None (8) · landing (7) · Propulsion (4) · wheels (4) · navigation (3) · structure (3) · chassis (3) · biplane (2) · Landing gear (2) · airfoil (2) · frame (2) · Propellers (2)
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