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US Patent: 4,542
Balancing valves of steam-engines
Patentees: Henry R. Worthington (exact or similar names) - Brooklyn, NY William H. Baker (exact or similar names) - Brooklyn, NY USPTO Classifications: 119/77, 137/625.25, 70/303R Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: None Manufacturer: Not known to have been produced Witnesses: John James Newton J. W. Carrington	Patent Dates: Granted: May 28, 1846 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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