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US Patent: 1,993,822
Grinding Machine
Patentees: Swan E. Bergstrum (exact or similar names) - Cincinnati, OH George W. Binns (exact or similar names) - Cincinnati, OH Robert E. W. Harrison (exact or similar names) - Cincinnati, OH Frederick S. Haas (exact or similar names) - Cincinnati, OH USPTO Classifications: 451/246, 451/335 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. 31, 1931 Granted: Mar. 12, 1935 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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