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US Patent: 1,925,709
Cylinder grinding tool
Patentee: Herman W. Zimmerman (exact or similar names) - Chicago, IL USPTO Classifications: 451/475, 451/476 Tool Categories: specialty tools : automotive tools trade specific : vehicle repairer : vehicle mechanic : cylinder maintenance Assignees: Automotive Maintenance Machinery Co. - Chicago, IL Manufacturer: Automotive Maintenance Machinery Co. - North Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Jul. 12, 1930 Granted: Sep. 05, 1933 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Automotive Maintenance Machinery Co. (AMMCO)

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