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US Patent: 2,042,257
Machine Tool
Patentees: Robert E. W. Harrison (exact or similar names) - Cincinnati, OH Cecil W. Hopkins (exact or similar names) - Cincinnati, OH USPTO Classifications: 193/31R, 33/792, 38/1C, 409/133, 451/1, 451/17, 451/19, 451/242, 451/245, 451/6, 451/64, 81/57.4, 82/137 Tool Categories: metalworking machines : grinding machines Assignees: Cincinnati Grinders, Inc. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 30, 1931 Granted: May 26, 1936 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Grinders, Inc.

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