| US Patent: 3,986,088 
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| A.C. Motor Control Apparatus and Method (CNC Control Circuitry) | 
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| 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 |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Feb. 19, 1975 |  
| Granted: | Oct. 12, 1976 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Kearney  Trecker Corp.
 
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