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US Patent: 1,256,968
Expansive Drilling Bit
Patentee:
Wlter L. Young (exact or similar names) - Harper, CA

USPTO Classifications:
175/290, 175/399

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
James R. Townsend
Patent Dates:
Applied: Apr. 09, 1917
Granted: Feb. 19, 1918

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
Description:
James R. Townsend - patent attorney

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