Drilldown: Patents

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Patents > Tech fields : Airship or propulsion & Grant date: 1890 - 1899 & Family year: 1800 - 1899 & Number of text pages: 1-2

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Inventors:
Georg Wellner (2) · Edward Zarski (2) · Stewart Cairncross (2) · Richard Czygan (2) · Oscar Roeper (2)
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DE 77 (18) · None (5) · HU V/h (3) · USPC 244/26 (2) · USPC 180/220 (2) · USPC 244/30 (2)
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