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US Patent: 126,522
Improvement in Devices for Boring Spherical Seats
Patentee: William E. Cooper (exact or similar names) - Hornellsville, Steuben County, NY USPTO Classifications: 279/6, 409/178, 451/431, 82/1.5, 82/128 Tool Categories: metalworking machines : drilling and boring : drilling and boring tool holders Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: May 07, 1872 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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