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US Patent: 3,313,187
Boring bar insert
Patentees: David D. Walker (exact or similar names) - Chagrin Falls, OH Milton L. Benjamin (exact or similar names) - Chagrin Falls, OH USPTO Classifications: 408/153 Tool Categories: metalworking tools : boring bars Assignees: Erickson Tool Co. - Solon, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 23, 1966 Granted: Apr. 11, 1967 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Erickson Tool Co.

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