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US Patent: 2,320,023
Torque measuring wrench
Patentee: Herman W. Zimmerman (exact or similar names) - Highland Park, IL USPTO Classifications: 73/862.23, 73/862.26 Tool Categories: wrenches : torque wrenches trade specific : vehicle repairer : vehicle mechanic specialty tools : automotive tools Assignees: Automotive Maintenance Machinery Co. - North Chicago, IL Manufacturer: Automotive Maintenance Machinery Co. - North Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Mar. 18, 1940 Granted: May 25, 1943 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Stan Schulz "Vintage Machinery" entry for Automotive Maintenance Machinery Co. (AMMCO)

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