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Patents > Filing date: 1890 - 1899 & IPCs : IPC B64B1/00 or IPC B64B1/58 or IPC B64C25/00 or IPC B64C3/54

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LTA (26) · balloon (12) · navigation (10) · propulsion (9) · frame (8) · car (8) · rudder (8) · parachute (6) · propeller (5) · safety (4) · propellers (2) · stability (2) · electricity (2)
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