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US Patent: 422,769
Liberating valve-gear for engines
Patentee: Noble T. Greene (exact or similar names) - Providence, RI USPTO Classifications: 91/250, 91/260, 91/271, 91/331, 91/351 Tool Categories: propulsion and energy : steam engines : steam engine valve gear Assignees: None Manufacturer: Providence Steam Engine Co. - Providence, RI Witnesses: Charles Hannigan Albert W. Dakin	Patent Dates: Applied: Oct. 21, 1889 Granted: Mar. 04, 1890 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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