Drilldown: Patents

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Patents > Year granted: 1870 - 1879 & Grant date: 1800 - 1899 & Number of text pages: 2

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LTA (11) · propulsion (9) · Human-powered (6) · propeller (6) · flapping (6) · navigation (5) · frame (5) · balloon (4) · marine (4) · military (3) · projectile (3) · car (3) · gas (2) · landing (2) · cargo (2) · Airplane (2) · rudder (2) · parachute (2) · None (2)
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