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US Patent: 425,219
Exhaust-valve-gear for engines
Patentee: Noble T. Greene (exact or similar names) - Providence, RI USPTO Classifications: 91/250, 91/260, 91/270, 91/330, 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 George H. Remington	Patent Dates: Applied: Dec. 10, 1889 Granted: Apr. 08, 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.
Description: Improvements to patent 12,507.

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