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US Patent: 4,628,441
Automatic Dynamic Error Compensator
Patentees: Richard Johnstone (exact or similar names) - Brookfield, Waukesha County, WI Edward E. Kirkham (exact or similar names) - Brookfield, Waukesha County, WI Han-Chang Chung (exact or similar names) - West Allis, Milwaukee County, WI Lyle D. Ostby (exact or similar names) - Milwaukee, Milwaukee County, WI USPTO Classifications: 318/603, 409/133, 700/193 Tool Categories: metalworking machines : metalworking machine mechanisms Assignees: Kearney & Trecker Corp. - West Allis, Milwaukee County, WI Manufacturer: Kearney & Trecker Corp. - West Allis, Milwaukee County, WI Witnesses: Unknown	Patent Dates: Applied: Jan. 29, 1983 Granted: Dec. 09, 1986 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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