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US Patent: 407,577
Machine for back-clearing twist-drills
Patentee: Jacob D. Cox, Jr. (exact or similar names) - Cleveland, OH USPTO Classifications: 451/143, 451/220, 451/375, 451/406, 451/414, 451/450 Tool Categories: woodworking machines : specialty woodworking machines : tool making machines Assignees: Cox & Prentiss - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: H. F. Fisher William M. Monroe	Patent Dates: Applied: Jan. 24, 1887 Granted: Jul. 23, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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