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US Patent: 4,533,859
Motorized Ball Nut
Patentee: Richard Johnstone (exact or similar names) - Brookfield, Waukesha County, WI USPTO Classifications: 318/630, 318/661, 318/9 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: Mar. 15, 1982 Granted: Aug. 06, 1985 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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