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US Patent: 3,878,445
A.C. Motor Control Apparatus and Method (CNC Control Circuitry)
Patentees:
Edward E. Kirkham (exact or similar names) - Brookfield, Waukesha County, WI
Frank Zankl (exact or similar names) - Milwaukee, Milwaukee County, WI
Richard Stobbe (exact or similar names) - Greenfield, Milwaukee County, WI
John J. Schachte (exact or similar names) - Wauwatosa, Milwaukee County, WI

USPTO Classifications:
318/799, 318/800, 318/808

Tool Categories:
metalworking machines : machine tool controls

Assignees:
Kearney & Trecker Corp. - West Allis, Milwaukee County, WI

Manufacturer:
Kearney & Trecker Corp. - West Allis, Milwaukee County, WI

Witnesses:
Unknown

Patent Dates:
Applied: Sep. 01, 1972
Granted: Apr. 15, 1975

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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