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Patents > CPCs : CPC B64C13/0421 or CPC B64C39/005 & Number of claims: 7-60

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propulsion (13) · navigation (9) · airplane (9) · frame (8) · None (6) · flapping (5) · propeller (5) · stability (5) · airfoil (5) · wheels (4) · rudder (4) · helicopter (3) · hybrid (3) · parachute (3) · LTA (3)
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