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US Patent: 1,277,970
Drilling Bit
Patentee:
Norman J. McKenzie - Bisbee, AZ

USPTO Classifications:
175/418

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Oct. 15, 1917
Granted: Sep. 03, 1918

Patent Pictures:
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Description:
Jerry A. Mathews - patent attorney

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