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US Patent: 3,313,187
Boring bar insert
Patentees:
David D. Walker - Chagrin Falls, OH
Milton L. Benjamin - Chagrin Falls, OH

USPTO Classifications:
408/153

Tool Categories:
metalworking machines : drilling and boring : boring bars
metalworking tools : boring bars

Assignees:
Erickson Tool Co. - Solon, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 23, 1966
Granted: Apr. 11, 1967

Patent Pictures:
USPTO pdf tiff
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