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US Patent: 814,648
Chuck for Metalworking Machines
Patentee: Bengt M. W. Hanson (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 279/146, 279/55 Tool Categories: metalworking machines : metal lathes : metal lathe chucks Assignees: Pratt & Whitney Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 06, 1903 Granted: Mar. 06, 1906 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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