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US Patent: 1,582,669
Screw Thread Cutting Means for Bench Lathes
Patentee: Henry E. Durkee (exact or similar names) - Glastonbury, Hartford County, CT USPTO Classifications: 470/181, 470/80, 82/111, 82/136 Tool Categories: metalworking machines : metal lathes : screwcutting lathes Assignees: Pratt & Whitney Co. - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 05, 1923 Granted: Apr. 27, 1926 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.

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