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US Patent: 39,799
Improvement in governors for steam-engines
Patentee: Frank Douglas (exact or similar names) - Norwich, CT USPTO Classifications: 74/404.5 Tool Categories: propulsion and energy : steam engines : steam engine governors Assignees: None Manufacturer: Douglas, Rogers & Co. - Norwich, CT Witnesses: H. H. Starkweather George Pratt	Patent Dates: Granted: Sep. 08, 1863 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for C. B. Rogers & Co. "Vintage Machinery" entry for Frank Douglas Machinery Co.

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