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US Patent: 2,863,640
Offset Boring Head for Auger
Patentee:
Gerald A. M. Petersen (exact or similar names) - Santa Clara, Santa Clara County, CA

USPTO Classifications:
175/323, 175/392, 175/394

Tool Categories:
specialty tools : well digging or drilling tools

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 18, 1955
Granted: Dec. 09, 1958

Patent Pictures:
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