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US Patent: 4,487,087
Ball Nut Having Adjustable Preload
Patentee: Richard Johnstone (exact or similar names) - Brookfield, Waukesha County, WI USPTO Classifications: 74/409, 74/441, 74/89.42 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: May 21, 1984 Granted: Dec. 11, 1984 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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