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US Patent: 1,299,452
Blow Off Valve
Patentee: Ralph W. Foster (exact or similar names) - Boston, Suffolk County, MA USPTO Classifications: 251/284 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : blow off valves Assignees: Crosby Steam Gage & Valve Co. - Boston, Suffolk County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 10, 1915 Granted: Apr. 08, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Crosby Steam Gage & Valve Co.

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