Drilldown: Patents

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Patents > Inventor country: US & Tech fields: propulsion & Filing date: 1890 - 1899 & Family year: 1800 - 1899

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None (6) · DE 77 (3) · USPC 416/112 (2) · GB 4 with buoyant (2) · USPC 244/30 (2) · USPC 244/28 (2) · USPC 180/220 (2) · USPC 244/27 (2) · USPC 244/25 (2)
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