Drilldown: Patents

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Patents > Inventor country : RU or US & Tech fields : airplane or propulsion or subsystem & Family year: 1800 - 1899 & Number of text pages: 2

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None (4) · DE 77 (3) · USPC 244/26 (3) · USPC 244/28 (2) · USPC 244/30 (2) · USPC 180/220 (2) · USPC 244/73R (2)
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