Drilldown: Patents

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Patents > Year filed: 1890 - 1899 & IPCs : IPC B64B1/00 or IPC B64B1/58 or IPC B64B1/62

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LTA (27) · balloon (13) · navigation (11) · propulsion (10) · frame (9) · rudder (8) · car (7) · parachute (7) · propeller (5) · safety (4) · sail (2) · stability (2) · gas (2) · dirigible (2) · electricity (2) · propellers (2)
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