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US Patent: 121,494
Improvements in Chucks for Metal-Turning Lathes
Patentee: Austin F. Cushman (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 279/116 Tool Categories: metalworking machines : metal lathes : metal lathe chucks Assignees: None Manufacturer: Cushman Chuck Co. - Hartford, Hartford County, CT Witnesses: George G. Sill A. Henry Embler Harry King Philip F. Dodge	Patent Dates: Granted: Dec. 05, 1871 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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