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Patents > National tech categories : AT 77d or USPC 244/17.19 & Number of claims: 4-20

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None (17) · Adolf Warchalowski (3) · Orville Wright (2) · Wilbur Wright (2) · Samuel Dimmick Mott (2) · William Phillips (2) · Adolf Freiherr Odkolek von Augezd (2)
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Airplane (21) · frame (19) · stability (9) · propulsion (9) · construction (8) · LTA (8) · Design (8) · wings (8) · propeller (6) · flapping (6) · Helicopter (5) · Subsystem (5) · aerodynamics (5) · military (4) · Control (4) · balloon (4) · car (4) · biplane (4) · propellers (4) · wheels (4)
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