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US Patent: 2,293,176
Collet chuck construction
Patentee: Knut R. Sjogren (exact or similar names) - Los Angeles, CA USPTO Classifications: 279/53 Tool Categories: metalworking machines : metal lathes : metal lathe chucks Assignees: None Manufacturer: Hardinge Brothers, Inc. - Elmira, NY Witnesses: Unknown	Patent Dates: Applied: Jul. 26, 1940 Granted: Aug. 18, 1942 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hardinge Brothers, Inc.

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