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US Patent: 186,890
Improvement in screw-cutting dies
Patentee:
Albert J. Smart - Greenfield, MA

USPTO Classifications:
408/162, 408/180

Tool Categories:
industrial tools : taps and dies

Assignees:
Wiley & Russell Manufacturing Co. - Greenfield, MA

Manufacturer:
Wiley & Russell Manufacturing Co. - Greenfield, MA

Witnesses:
Dwight B. Kellogg
Philipp Tubalt

Patent Dates:
Applied: May 10, 1876
Granted: Jan. 30, 1877

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Wiley & Russell Manufacturing Co.

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