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US Patent: 3,531,615
Electrical discharge machining with step driven electrode
Patentee: Frank X. Zammit (exact or similar names) - West Bloomfield, MI USPTO Classifications: 118/665, 118/688, 219/69.16, 314/65, 318/650, 318/685 Tool Categories: metalworking machines : electrical discharge machining Assignees: F. Joseph Lamb Co. - Detroit, MI Manufacturer: F. Joseph Lamb Co. - Detroit, MI Witnesses: Unknown	Patent Dates: Applied: Sep. 08, 1966 Granted: Sep. 29, 1970 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for F. Joseph Lamb Co.

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