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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: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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