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Patents > National tech categories: USPC 244/64 & Cites these patents : 1909 or None

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human-powered (17) · flapping (14) · frame (14) · LTA (13) · propulsion (10) · propeller (8) · hybrid (8) · airfoil (5) · None (5) · ornithopter (4) · stability (4) · airplane (3) · navigation (3) · wheels (3) · car (3) · landing (3)
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Showing below up to 38 results in range #1 to #38.

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