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US Patent: 59,848
Improvement in balance slide valves
Patentee: John Lochhead (exact or similar names) - San Francisco, CA USPTO Classifications: 251/282 Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: None Manufacturer: John Lochhead - San Francisco, CA Witnesses: C. A. Mathieu J. W. McKenzie	Patent Dates: Granted: Nov. 20, 1866 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for John Lochhead

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