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GB Patent: GB-309,412
Improvements in or Relating to Processes of and Machines for Grinding Work Pieces with a Plurality of Unequal Diameters
Patentee: none listed (exact or similar names) - none listed, USPTO Classifications: Tool Categories: metalworking machines : grinding machines Assignees: Cincinnati Grinders, Inc. - Cincinnati, Hamilton County, OH Manufacturer: Cincinnati Grinders, Inc. - Cincinnati, Hamilton County, OH Witnesses: Unknown	Patent Dates: Applied: Apr. 09, 1928 Granted: May 22, 1930 Patent Pictures: Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Grinders, Inc.

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