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Patents > National tech categories: USPC 244/80 & Number of claims: 8-16

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stability (11) · airplane (6) · automatic stability (6) · pendulum (4) · frame (4) · None (3) · takeoff (3) · propeller (3) · LTA (3) · equilibrium (2) · wheels (2) · rudder (2) · navigation (2) · aeroplane (2) · wings (2) · control (2) · balance (2)
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