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US Patent: 3,168,638
Method of Electro-Discharge Machining and Fluids for Use Therin
Patentee: Milton J. Riddles (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 219/69.14 Tool Categories: metalworking machines : electrical discharge machining manufacturing : manufacturing processes Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 19, 1962 Granted: Feb. 02, 1965 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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