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US Patent: 2,129,485
Boring machine
Patentee: Herman W. Zimmerman (exact or similar names) - Chicago, IL USPTO Classifications: 269/48, 269/50, 269/52, 408/103, 408/707, 408/98, 409/903 Tool Categories: metalworking machines : boring and turning machines trade specific : vehicle repairer : vehicle mechanic : connecting rod and pin maintenance Assignees: Automotive Maintenance Machinery Co. - Chicago, IL Manufacturer: Automotive Maintenance Machinery Co. - North Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Mar. 08, 1935 Granted: Sep. 06, 1938 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 machine is intended for "the precise fitting of piston pins", or wrist pins.

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