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US Patent: 783,502
Clamp or vise
Patentees:
John Black - Mendota, IL
William Black - Mendota, IL

USPTO Classifications:
269/165, 269/222, 269/238

Tool Categories:
work holding : clamps : hand screws

Assignees:
None

Manufacturer:
Black Brothers Machinery Co. - Chicago, IL

Witnesses:
George H. Madden
Dan C. Haskell

Patent Dates:
Applied: Feb. 09, 1903
Granted: Feb. 28, 1905

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Black Bros. Co.

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