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US Patent: 2,007,490
Ring filing structure
Patentee:
Herman W. Zimmerman (exact or similar names) - Chicago, IL

USPTO Classifications:
29/76.1

Tool Categories:
specialty tools : automotive tools
trade specific : vehicle repairer : vehicle mechanic : piston and ring maintenance

Assignees:
Automotive Maintenance Machinery Co. - Chicago, IL

Manufacturer:
Automotive Maintenance Machinery Co. - North Chicago, IL

Witnesses:
Unknown
Patent Dates:
Applied: Jan. 30, 1933
Granted: Jul. 09, 1935

Patent Pictures:
USPTO (New site tip)
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Automotive Maintenance Machinery Co. (AMMCO)

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