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US Patent: 12,507
Cut-off valve for steam-engines
Patentee: Noble T. Greene (exact or similar names) - Bridgeport, CT USPTO Classifications: 251/251 Tool Categories: propulsion and energy : steam engines : steam engine valve gear Assignees: None Manufacturer: Providence Steam Engine Co. - Providence, RI Witnesses: William T. Bishop Andrew De Lacy	Patent Dates: Granted: Mar. 13, 1855 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Providence Steam Engine Co.

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