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US Patent: 47,543
Die for Cutting Male-Screw Threads
Patentee:
Benjamin S. Hill - New York, NY

USPTO Classifications:
408/215

Tool Categories:
metalworking tools : taps and dies

Assignees:
None

Manufacturer:
Walworth Mfg. Co. - Cambridgeport, Middlesex County, MA

Witnesses:
J. W. Coombs
G. W. Reed

Patent Dates:
Granted: May 02, 1865

Patent Pictures: [ 1 | 2 | 3 ]
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