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US Patent: 2,815,040
Pressure relief valve
Patentee: Ronald V. Smith (exact or similar names) - Pennsauken, NJ USPTO Classifications: 137/469, 137/533.29, 137/540, 251/360 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: J. E. Lonergan Co. - Philadelphia, PA Manufacturer: J. E. Lonergan Co. - Philadelphia, PA Witnesses: Unknown	Patent Dates: Applied: Jan. 13, 1954 Granted: Dec. 03, 1957 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for J. E. Lonergan Co.

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