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US Patent: 959,653
Valve-seat grinder
Patentee: Elvin E. Townsend (exact or similar names) - Oakland, CA USPTO Classifications: 451/117, 74/70 Tool Categories: trade specific : vehicle repairer : vehicle mechanic trade specific : vehicle repairer : vehicle mechanic Assignees: None Manufacturer: Not known to have been produced Witnesses: F. P. Schroeder H. C. Schroeder	Patent Dates: Applied: Apr. 17, 1909 Granted: May 31, 1910 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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