Drilldown: Patents

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Patents > Year granted: 1890 - 1899 & National tech categories: GB 4 without buoyant

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propulsion (8) · navigation (6) · propeller (5) · frame (5) · wings (4) · rudder (4) · heavier-than-air (3) · flapping (3) · airplane (3) · takeoff (3) · design (2) · steam (2) · stability (2) · captive (2) · glider (2) · kite (2)
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Showing below up to 17 results in range #1 to #17.

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