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US Patent: 1,674,890
Expansion reamer
Patentee: Emery E. Davis (exact or similar names) - St. Louis, MO USPTO Classifications: 408/170 Tool Categories: metalworking machines : drilling and boring : drill bits : reamers Assignees: Davis Boring Tool Co. - St. Louis, MO Manufacturer: Davis Boring Tool Co. - St. Louis, MO Witnesses: Unknown	Patent Dates: Applied: Oct. 27, 1922 Granted: Jun. 26, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Davis Boring Tool Co.

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