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US Patent: 306,052
Bench Clamp
Patentee:
John Birch (exact or similar names) - Dayton, OH

USPTO Classifications:
144/307

Tool Categories:
work holding : vises

Assignees:
John Birch - Dayton, OH
William Edward Sparks - Dayton, OH

Manufacturer:
Not known to have been produced

Witnesses:
Alphonso Roseboom
W. Edward Sparks
Patent Dates:
Applied: Aug. 14, 1884
Granted: Oct. 07, 1884

Patent Pictures:
Patent Fig. 1
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