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US Patent: 15,400
Relieving steam slide-valves from pressure
Patentee: Henry R. Worthington (exact or similar names) - New York, NY USPTO Classifications: 251/175, 251/187 Tool Categories: propulsion and energy : steam engines : steam engine valve gear Assignees: None Manufacturer: Not known to have been produced Witnesses: Charles C. Barton William A. Perry	Patent Dates: Granted: Jul. 22, 1856 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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