Drilldown: Patents

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Patents > Grant date: 1870 - 1879 & Family year: 1800 - 1899 & Number of text pages: 2-3

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LTA (12) · propulsion (12) · propeller (8) · marine (5) · navigation (5) · flapping (5) · balloon (4) · frame (4) · human-powered (4) · Airplane (3) · car (3) · projectile (3) · military (3) · landing (2) · rudder (2) · mooring (2) · None (2) · gas (2) · cargo (2) · hybrid (2)
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None (6) · DE 77 (4) · USPC 244/28 (2) · USPC 244/3.23 (2) · USPC 244/19 (2)
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