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US Patent: 1,420,147
Self Supporting Clamp
Patentee:
Charles C. Roberts (exact or similar names) - Ansonia, CT

USPTO Classifications:
269/210, 269/265, 269/93, 409/241

Tool Categories:
work holding : vises

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 21, 1919
Granted: Jun. 20, 1922

Patent Pictures: [ 1 | 2 ]
Patent Fig. 1
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