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US Patent: 793,947
Steam Safety Valve
Patentees: Joshua H. Millett (exact or similar names) - Malden, Middlesex County, MA Frederick A. Hannah (exact or similar names) - Medford, Middlesex County, MA USPTO Classifications: 137/516.25, 137/543.19 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: Crosby Steam Gage & Valve Co. - Boston, Suffolk County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 29, 1904 Granted: Jul. 04, 1905 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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