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US Patent: 521,510
Lathe for Relieving Taps
Patentee: William A. Robertson (exact or similar names) - Cedar Rapids, Linn County, IA USPTO Classifications: 142/12, 82/19 Tool Categories: metalworking machines : metal lathes : backing off lathes metalworking machines : metal relieving attachments Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 13, 1894 Granted: Jun. 19, 1894 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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