Drilldown: Patents

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Patents > Full specification filed date: 1890 - 1899 & Number of text pages: 3-8

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navigation (13) · LTA (11) · propeller (9) · propulsion (8) · frame (8) · hybrid (6) · balloon (6) · None (4) · stability (4) · airplane (4) · car (4) · human-powered (3) · helicopter (3) · heavier-than-air (3) · flapping (3) · rudder (3) · airfoil (3) · compartments (3)
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