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US Patent: 588,222
Tool Holder
Patentee: Frank G. Echols (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 82/137, 82/161 Tool Categories: metalworking machines : metal lathes : lathe tool holders and tool posts Assignees: Pratt & Whitney Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 25, 1897 Granted: Aug. 17, 1897 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.
Description: "Vintage Machinery" entry for Pratt & Whitney Co.

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