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US Patent: 2,338,509
Grinding Machine
Patentees: Robert S. Beverlin (exact or similar names) - Toledo, Lucas County, OH Ernest A. Hall (exact or similar names) - Toledo, Lucas County, OH USPTO Classifications: 188/146 Tool Categories: specialty tools : valve grinding tools trade specific : vehicle repairer : vehicle mechanic : valve and seat maintenance specialty tools : valve reseating tools Assignees: Hall Manufacturing Co. - Toledo, Lucas County, OH Manufacturer: Hall Manufacturing Co. - Toledo, Lucas County, OH Witnesses: Unknown	Patent Dates: Applied: Jan. 19, 1943 Granted: Jan. 04, 1944 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Hall Manufacturing Co.

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