Drilldown: Patents

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Patents > Year filed: 1840 - 1849 & Applicant type: INDIV & CPCs: None

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navigation (13) · LTA (11) · marine (8) · submarine (7) · propellers (7) · elevated railway (2) · wheels (2) · rudder (2) · propulsion (2) · propeller (2) · landing (2) · frame (2) · whole (2)
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