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US Patent: 2,793,547
Adjustable bit boring bar
Patentees:
Franklyn E. Winnen - Cleveland, OH
Milton L. Benjamin - Cleveland, OH

USPTO Classifications:
408/153

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

Assignees:
Erickson Tool Co. - Cleveland, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 26, 1954
Granted: May 28, 1957

Patent Pictures:
USPTO pdf tiff
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