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CA Patent: CA-1,220,018
Motorized ball nut
Patentee: Richard Johnstone (exact or similar names) - Brookfield, WI USPTO Classifications: Tool Categories: metalworking machines : metalworking machine mechanisms Assignees: Kearney & Trecker Corp. - West Allis, WI Manufacturer: Kearney & Trecker Corp. - West Allis, WI Witnesses: Unknown	Patent Dates: Applied: Mar. 14, 1983 Granted: Apr. 07, 1987 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Jeff Joslin "Vintage Machinery" entry for Kearney & Trecker Corp.

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