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US Patent: 644,310
Multiple Spindle Screw Machine
Patentees: Louis C. Woerner (exact or similar names) - Hartford, Hartford County, CT Frank Harrington (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 226/109, 29/36, 29/64, 74/569, 74/817 Tool Categories: metalworking machines : screw machines metalworking machines : metal lathes : multiple spindle lathes Assignees: Pratt & Whitney Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 02, 1898 Granted: Feb. 27, 1900 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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