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Patents > CPCs : CPC B64B1/58 or CPC B64C23/005 & Number of claims: 10-12

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propeller (7) · frame (6) · airplane (6) · helicopter (5) · navigation (5) · stability (4) · LTA (4) · wheels (3) · takeoff (3) · rudder (3) · parachute (3) · hybrid (3) · None (3) · balloon (3) · fabric (2) · texture (2) · airfoil (2) · subsystem (2) · landing (2) · propulsion (2)
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