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US Patent: 1,857,012
Tap holder
Patentee:
Mark H. Corley (exact or similar names) - Chicago, IL

USPTO Classifications:
279/123, 279/56, 470/198

Tool Categories:
metalworking machines : drilling and boring : tapping heads and chucks
metalworking tools : tap and die holders

Assignees:
Procunier Safety Chuck Co. - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 13, 1931
Granted: May 03, 1932

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for William L. Procunier, Procunier Safety Chuck Co.
Description:
Improvement on patent 1,117,241.

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