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US Patent: 802,737
Expansion boring-tool
Patentee: Emery E. Davis (exact or similar names) - St. Louis, MO USPTO Classifications: 408/179, 408/185 Tool Categories: metalworking machines : drilling and boring : boring heads Assignees: None Manufacturer: Davis Expansion Boring Tool Co. - St. Louis, MO Matthews-Davis Tool Co. - St. Louis, MO Witnesses: Blanche Hogan Nellie V. Alexander	Patent Dates: Applied: Aug. 10, 1903 Granted: Oct. 24, 1905 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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