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US Patent: 2,821,404
Collet Chuck with Internal Work Stop Provisions
Patentee: Harry E. Sloan (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 279/156, 279/51 Tool Categories: metalworking machines : metal lathes : metal lathe chucks Assignees: Cushman Chuck Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 21, 1953 Granted: Jan. 28, 1958 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cushman Chuck Co.

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