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US Patent: 395,536
Safety-valve
Patentee: Henry G. Ashton (exact or similar names) - Somerville, MA USPTO Classifications: 137/523, 137/542, 251/86 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: None Manufacturer: Ashton Valve Co. - Boston, MA Witnesses: William A. Copeland John R. Snow	Patent Dates: Applied: Jun. 12, 1885 Granted: Jan. 01, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ashton Valve Co.
Description: The inventor disclaims patent #'s 90,278, 10,800, 86,346, and GB-187,300,030.

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