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US Patent: 2,215,344
Expansion Bit
Micro Dial
Patentee:
Alfred P. Albrecht (exact or similar names) - Wilmington, OH

USPTO Classifications:
408/152

Tool Categories:
woodworking tools : hand drills : drill bits
woodworking tools : hand drills : drill bits : auger bits

Assignees:
Irwin Auger Bit Co. - Wilmington, OH

Manufacturer:
Irwin Auger Bit Co. - Wilmington, OH

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 25, 1839
Granted: Sep. 17, 1940

Patent Pictures:
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Report data errors or omissions to steward Russ Allen.
Description:
Locking micrometer type adjustment of the cutter.

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