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US Patent: D220,920
Double End Cutting Insert
Patentee: Burton L. Cochran (exact or similar names) - North Canton, OH USPTO Classifications: D15/139 Tool Categories: metalworking machines : metal lathes : lathe tools Assignees: Warner & Swasey Co. - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 18, 1970 Granted: Jun. 15, 1971 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Warner & Swasey Co.

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