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US Patent: 1,273,724
Drill Rod Connection
Patentee:
John D. Boughner - Yorba Linda, CA

USPTO Classifications:
175/421, 285/117, 403/11, 403/314

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. R. Walker
W. M. Gertle

Patent Dates:
Applied: Oct. 29, 1917
Granted: Jul. 23, 1918

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
Alex H. Lidders - patent attorney

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