Drilldown: Patents

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Patents > National tech categories : GB 4 propel & steer or USPC 244/30 or USPC 244/80 & Family year: 1890 - 1899 & Cites these patents : Patent AT-1909-47911 or None

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propulsion (13) · LTA (13) · propeller (10) · navigation (9) · frame (8) · car (6) · airplane (5) · parachute (4) · balloon (4) · stability (3) · heavier-than-air (3) · rudder (3) · safety (3) · landing (3)
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