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US Patent: 2,546,906
Screw-actuated vise having releasable nut for quickly opening or closing the jaws
Patentees:
Fred P. Hopfeld (exact or similar names) - Elmwood Park, IL
Anthony M. Sasgen (exact or similar names) - Chicago, IL

USPTO Classifications:
269/182, 269/285, 269/85

Tool Categories:
work holding : vises : bench vises

Assignees:
Grand Specialties Co. - Chicago, IL

Manufacturer:
Grand Specialties Co. - Chicago, IL

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 30, 1945
Granted: Mar. 27, 1951

Patent Pictures:
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Google Patents
Report data errors or omissions to steward Carl Matthews
"Vintage Machinery" entry for Grand Specialties Co.

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