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US Patent: 167,865
Improvement in balanced valves
Patentee: John F. Allen (exact or similar names) - New York, NY USPTO Classifications: 251/175 Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: George T. Hope - Bay Ridge, NY Charles T. Porter - New York, NY Manufacturer: Porter-Allen Engine Co. - New York, NY Witnesses: William T. McNamara A. B. Deming	Patent Dates: Applied: Aug. 01, 1874 Granted: Sep. 21, 1875 Reissue Information: Reissued as RE9,303 (Jul. 20, 1880) 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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