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CA Patent: CA-209,318
Worm Grinder Meule a vis Tangente
Patentee: William F. Zimmermann (exact or similar names) - New York, NY USPTO Classifications: Tool Categories: metalworking machines : grinders : gear grinding machines Assignees: Cincinnati Grinder Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 17, 1920 Granted: Mar. 08, 1921 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Grinders, Inc.

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