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US Patent: 732,160
Clamp
Patentee:
John Black - Mendota, IL

USPTO Classifications:
269/130, 269/165, 269/207, 269/221, 269/248, 269/285

Tool Categories:
work holding : clamps : bar and pipe clamps

Assignees:
None

Manufacturer:
Black Brothers Machinery Co. - Chicago, IL

Witnesses:
George H. Reichardt
Walter Black

Patent Dates:
Applied: Aug. 27, 1902
Granted: Jun. 30, 1903

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

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