Drilldown: Patents

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Patents > Filing date: 1890 - 1899 & National tech categories: GB 4 without buoyant & Cites these patents: None

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propulsion (14) · navigation (7) · heavier-than-air (7) · frame (7) · propeller (7) · rudder (5) · wings (4) · flapping (4) · airplane (4) · steam (4) · parachute (3) · takeoff (3) · car (3) · design (3)
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