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US Patent: 95,868
Improvement in steam-engine slide-valves
Patentee: John F. Allen (exact or similar names) - Tremont, NY USPTO Classifications: 137/625.25 Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: None Manufacturer: Porter-Allen Engine Co. - New York, NY Witnesses: Frank Blockley Alexander F. Roberts	Patent Dates: Granted: Oct. 19, 1869 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Porter-Allen Engine Co.

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