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US Patent: 2,033,324
Process of Grinding
Patentees: John E. Caster (exact or similar names) - Cincinnati, OH Lester F. Nenninger (exact or similar names) - Cincinnati, OH USPTO Classifications: 451/242, 451/49, 451/51 Tool Categories: metalworking machines : grinding machines Assignees: Cincinnati Grinders, Inc. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 16, 1930 Granted: Mar. 10, 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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