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US Patent: 2,155,072
Machine for sizing and finishing bores
Patentee: Herman W. Zimmerman (exact or similar names) - North Chicago, IL USPTO Classifications: 451/178, 451/340, 451/67 Tool Categories: metalworking machines : boring and turning machines trade specific : vehicle repairer : vehicle mechanic Assignees: Automotive Maintenance Machinery Co. - Chicago, IL Manufacturer: Automotive Maintenance Machinery Co. - North Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Feb. 08, 1936 Granted: Apr. 18, 1939 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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