Drilldown: Patents

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Patents > Filing date: 1880 - 1889 & Citations from after 1930: None & Number of diagram pages: 2-3

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LTA (17) · propulsion (10) · navigation (9) · rudder (5) · control (5) · balloon (5) · airship (5) · flapping (4) · propeller (4) · stability (3) · electricity (3) · marine (3) · steering (2) · human-powered (2) · parachute (2) · dirigible (2) · sail (2) · ornithopter (2)
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None (7) · DE 77 (7) · USPC 244/96 (2) · USPC 244/127 (2)
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