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US Patent: 1,959,891
Bearing hone
Patentee: Herman W. Zimmerman (exact or similar names) - North Chicago, IL USPTO Classifications: 451/476 Tool Categories: specialty tools : automotive tools trade specific : vehicle repairer : vehicle mechanic : connecting rod and pin maintenance Assignees: Automotive Maintenance Machinery Co. - North Chicago, IL Manufacturer: Automotive Maintenance Machinery Co. - North Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Jul. 03, 1930 Granted: May 22, 1934 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)
Description: This tool is intended for honing piston wrist-pin bores.

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