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US Patent: 2,311,258
Collet chuck
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: Jan. 26, 1942 Granted: Feb. 16, 1943 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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