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US Patent: 198,945
Improvement in collapsible screw-taps
Patentee:
James M. Johnson - Cleveland, OH

USPTO Classifications:
408/168, 470/199

Tool Categories:
industrial tools : taps and dies
metalworking tools : taps and dies

Assignees:
James M. Johnson - Cleveland, OH
Andrew Parker - Cleveland, OH

Manufacturer:
Andrew Parker - Cleveland, OH

Witnesses:
F. W. Cadwell
George W. Tibbetts

Patent Dates:
Granted: Jan. 08, 1878
Antedated: Sep. 21, 1877

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Andrew Parker

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