Drilldown: Patents

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Patents > Year filed: 1870 - 1879 & Number of text pages: 2-6 & Number of diagram pages: 1-2

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LTA (12) · propulsion (7) · navigation (5) · flapping (5) · human-powered (4) · balloon (4) · marine (4) · track (3) · car (3) · propeller (3) · projectile (3) · military (3) · steam (2) · parachute (2) · hydrogen (2) · None (2) · gas (2) · cargo (2) · frame (2)
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None (4) · CPC B64C27/54 (3) · CPC B64B1/40 (2) · CPC F42B10/30 (2) · CPC B64B1/58 (2) · CPC B64C33/02 (2) · CPC B64B1/00 (2)
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