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US Patent: 270,409
Screw-threading machine
Patentee: William D. Forbes (exact or similar names) - Bridgeport, CT USPTO Classifications: 470/66 Tool Categories: metalworking machines : metal threading machines : pipe threading machines Assignees: William D. Forbes - Bridgeport, CT Roderick P. Curtis - Bridgeport, CT Manufacturer: Curtis & Curtis Co. - Bridgeport, CT Witnesses: James F. Tobin Harry Smith	Patent Dates: Applied: Jul. 24, 1882 Granted: Jan. 09, 1883 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Curtis & Curtis Co.
Description: Improvements to patent 253,996. See also patents 270,408 and 270,409.

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