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US Patent: RE9,303
Balanced valve
Patentee: John F. Allen (exact or similar names) - Brooklyn, NY USPTO Classifications: 251/187 Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: Charles T. Porter - Philadelphia, PA George T. Hope - Bay Ridge, NY Manufacturer: Porter-Allen Engine Co. - New York, NY Witnesses: J. W. Durbrow De Witt Bogardus	Patent Dates: Applied: Jun. 02, 1880 Granted: Jul. 20, 1880 Reissue Information: Reissue of 167,865 (Sep. 21, 1875) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Charles. T. Porter; Porter-Allen Engine Co.

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