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CA Patent: CA-838,788
Motor Control System for Grinding Machines
Patentees: John Cyril Jones (exact or similar names) - Altrincham, Cheshire County, England John Derick Barclay (exact or similar names) - Altrincham, Cheshire County, England USPTO Classifications: Tool Categories: metalworking machines : grinders : roll grinding machines Assignees: Churchill Machine Tool Co., Ltd. - Altrincham, Cheshire County, England Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Apr. 07, 1970 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Churchill Machine Tool Co., Ltd.

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