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US Patent: 443,501
Pipe Threading Machine
Patentee:
Roderick P. Curtis - Southport, Fairfield County, CT

USPTO Classifications:
408/106

Tool Categories:
metalworking machines : pipe threading machines

Assignees:
Curtis & Curtis - Bridgeport, Fairfield County, CT

Manufacturer:
Curtis & Curtis - Bridgeport, Fairfield County, CT

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 28, 1890
Granted: Dec. 30, 1890

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Curtis & Curtis Co.

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