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US Patent: 518,938
Bit-stock
Articulating chuck with snap-in jaws
Patentee:
Frederick J. Colvin (exact or similar names) - Hamden, CT

USPTO Classifications:
279/89

Tool Categories:

Assignees:
None

Manufacturer:
F. J. Colvin - Hamden, CT

Witnesses:
Ellsworth B. Cooper
Samuel A. Baldwin
Patent Dates:
Applied: Oct. 14, 1893
Granted: May 01, 1894

Patent Pictures:
Image courtesy and (C) Martin Donnelly, https://www.mjdtools.com/
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