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US Patent: 1,993,831
Apparatus for Producing Surfaces of Revolution Eccentric to One Another
Patentee: Albert H. Dall (exact or similar names) - Cincinnati, OH USPTO Classifications: 451/246, 451/247, 451/385, 451/398 Tool Categories: metalworking machines : grinding machines Assignees: Cincinnati Grinders, Inc. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 28, 1933 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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