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US Patent: 2,129,485
Boring machine
Patentee:
Herman W. Zimmerman - 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 : automobile mechanic

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 pdf tiff
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"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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