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US Patent: RE4,538
Process for Making Articles of Steel etc.
Improvements in the Manufacture of Edge Tools
Samuel W. Collins (deceased) - Collinsville, CT

USPTO Classifications:

Tool Categories:

Collins Company - Collinsville, CT

Collins Company - Collinsville, CT

Sarah J. Simonds
J. E. Stuhr
J. H. Bidwell
Albert L. Thayer
Oliver F. Perry

Patent Dates:
Granted: Aug. 29, 1871

Reissue Information:
Reissue of 30,668 (Nov. 20, 1860)

Patent Pictures:
Collins Company Edge Tool Casting Process patent Aug. 29, 1871
USPTO pdf tiff
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Division of process patent for making edge and striking tools from mixed iron and steel castings. See original patent (no. 30,668) for more information.

Process patent used, along with parallel division (no. RE4,537) to produce Collins axes, etc.

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