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US Patent: 99,970
Improvement in Machine for Grinding and Polishing Bits Machine for Grinding & Polishing Bits
Patentee: James Swan (exact or similar names) - Seymour, CT USPTO Classifications: 451/143, 451/222 Tool Categories: tool making : making drills and augers woodworking tools : hand drills : drill bits : auger bits Assignees: None Manufacturer: Not known to have been produced Witnesses: John H. Swain B. W. Smith	Patent Dates: Granted: Feb. 15, 1870 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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