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US Patent: 52,789
Governor
Patentee: Alvin Lawrence (exact or similar names) - Lowell, Middlesex County, MA USPTO Classifications: 172/378, 91/448 Tool Categories: propulsion and energy : steam engines : steam engine governors Assignees: Alvin Lawrence - Lowell, Middlesex County, MA Ambrose Lawrence - Lowell, Middlesex County, MA John E. Crane - Lowell, Middlesex County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Feb. 20, 1866 Reissue Information: Reissued as RE8,937 (Oct. 21, 1879) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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