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US Patent: 2,793,547
Adjustable bit boring bar
Patentees:
Franklyn E. Winnen (exact or similar names) - Cleveland, OH
Milton L. Benjamin (exact or similar names) - Cleveland, OH

USPTO Classifications:
408/153

Tool Categories:
metalworking machines : drilling and boring : facing heads

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 (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Erickson Tool Co.

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