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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:
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Google Patents
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