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US Patent: 3,447,402
Damped Tuned Boring Bar
Patentee: Joseph C. Ray (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 408/143 Tool Categories: metalworking tools : boring bars Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 25, 1967 Granted: Jun. 03, 1969 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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