Drilldown: Patents

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Patents > Year filed: 1880 - 1889 & Number of figures: 8-60

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LTA (29) · navigation (17) · propulsion (13) · flapping (9) · propeller (9) · car (9) · frame (9) · rudder (7) · balloon (7) · airship (6) · stability (5) · cargo (5) · safety (4) · passenger (4) · human-powered (4) · None (4) · control (4) · wheels (3) · ornithopter (3) · military (3)
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