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US Patent: 171,082
Chuck and Centerer
Patentee: George F. Ballou (exact or similar names) - Boston, MA USPTO Classifications: 279/8, 82/150 Tool Categories: metalworking machines : metal lathes : metal lathe chucks Assignees: John E. Whitcomb - Waltham, Middlesex County, MA Manufacturer: American Watch Tool Co. - Waltham, Middlesex County, MA Witnesses: E. A. Marsh M. Wilde	Patent Dates: Applied: Sep. 29, 1875 Granted: Dec. 14, 1875 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ballou & Whitcomb

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