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US Patent: 2,226,226
Counterboring tool
Removable pilot for counterbore or reamer
Patentee:
Oscar C. Hedin (exact or similar names) - Minneapolis, MN

USPTO Classifications:
408/201

Tool Categories:
metalworking machines : drilling and boring : drill bits : metalworking countersinks
metalworking machines : drilling and boring : drill bits : reamers

Assignees:
Weldon Tool Co. - Cleveland, OH

Manufacturer:
Weldon Tool Co. - Cleveland, OH

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 10, 1939
Granted: Dec. 24, 1940

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Weldon Tool Co.

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