Drilldown: Patents

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Patents > Year filed: 1840 - 1849 & First filing: No

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LTA (14) · navigation (7) · marine (7) · propulsion (6) · submarine (6) · propellers (6) · passenger (3) · aero-as-power (2) · ascension (2) · balloon (2) · track (2) · cargo (2) · propeller (2) · human-powered (2)
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