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US Patent: 201,862
Improvement in Exhaust Mechanisms for Locomotives and Other Steam-Engines
Patentee: Henry G. Ashton (exact or similar names) - Somerville, Midlesex County, MA USPTO Classifications: 122/437 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: Ashton Valve Co. - Hartford, Hartford County, CT Manufacturer: Ashton Valve Co. - Boston, Middlesex County, MA Witnesses: J. E. Maynadier George O. G. Coale	Patent Dates: Applied: Dec. 19, 1877 Granted: Apr. 02, 1878 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ashton Valve Co.

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