Drilldown: Patents

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Patents > National tech categories : AT 77d or GB 4 without buoyant & Family year: 1890 - 1899

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propulsion (10) · frame (9) · propeller (8) · navigation (6) · LTA (5) · heavier-than-air (4) · Design (4) · airplane (4) · car (3) · rudder (3) · hybrid (3) · balloon (3) · Flapping (3) · steam (3) · parachute (3) · takeoff (3) · Wings (3)
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Showing below up to 24 results in range #1 to #24.

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