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US Patent: 497,632
Automatic Chuck
Patentee: Conrad M. Conradson (exact or similar names) - Madison, Dane County, WI USPTO Classifications: 279/55 Tool Categories: metalworking machines : screw machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 28, 1892 Granted: May 16, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Gisholt Machine Co.

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