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US Patent: 1,834,145
Valve seating counterboring tool
Patentee: Edwin L. Connell (exact or similar names) - Cleveland, OH USPTO Classifications: 408/111, 409/175 Tool Categories: Assignees: Van Dorn Electric Tool Co. - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Dec. 01, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Van Dorn Electric Tool Co.

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