Drilldown: Patents

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Patents > National tech categories : USPC 244/22 or USPC 416/60 & Number of text pages: 3-7

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flapping (18) · ornithopter (12) · frame (11) · None (9) · Propulsion (8) · airplane (7) · propeller (7) · navigation (7) · hybrid (7) · rudder (6) · takeoff (4) · marine (4) · landing (4) · airfoil (4) · wings (3) · LTA (3) · wheels (3) · stability (3) · parachute (3)
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