Drilldown: Patents

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Patents > Year filed: 1890 - 1899 & Number of text pages: 4-6 & Number of claims: 2-5

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propulsion (14) · frame (8) · LTA (8) · navigation (6) · balloon (5) · flapping (5) · propeller (4) · landing (3) · human-powered (3) · wheels (2) · takeoff (2) · safety (2) · rigid (2) · magnet (2) · hybrid (2) · gas (2) · None (2) · compartments (2) · electricity (2)
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Showing below up to 21 results in range #1 to #21.

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