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US Patent: 3,986,087
A.C. Motor Control Apparatus and Method (CNC Control Circuitry)
Patentees: Frank Zankl (exact or similar names) - Milwaukee, Milwaukee County, WI Edward E. Kirkham (exact or similar names) - Brookfield, Waukesha County, WI Richard E. Stobbe (exact or similar names) - Greenfield, Milwaukee County, WI John J. Schachte (exact or similar names) - Wauwatosa, Milwaukee County, WI USPTO Classifications: 318/803 Tool Categories: metalworking machines : metalworking machine mechanisms : tool changers and storage mechanisms Assignees: Kearney & Trecker Corp. - West Allis, Milwaukee County, WI Manufacturer: Kearney & Trecker Corp. - West Allis, Milwaukee County, WI Witnesses: Unknown	Patent Dates: Applied: Feb. 19, 1975 Granted: Oct. 12, 1976 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Kearney Trecker Corp.

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