Drilldown: Patents

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Patents > Year filed: 1880 - 1889 & Granted: Yes & Number of claims: 8-30

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LTA (18) · navigation (12) · propulsion (9) · propeller (8) · car (7) · frame (7) · balloon (6) · flapping (5) · cargo (4) · rudder (4) · passenger (3) · landing (3) · human-powered (3) · safety (3) · hybrid (3) · ornithopter (3)
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