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Patents > CPCs: CPC B64C39/005 & Number of claims: 5-9

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propulsion (11) · Airplane (9) · navigation (9) · None (9) · Frame (8) · hybrid (5) · propeller (5) · wheels (5) · heavier-than-air (4) · helicopter (4) · Design (4) · landing (4) · parachute (3) · flapping (3) · takeoff (3)
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