Insulated electrical conductor for pipes
United States Patent 2301783

Inventors:
Lee, Robert E.
Publication Date:
11/10/1942
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Assignee:
Lee, Robert E.
Primary Class:
439/191
Other Classes:
175/320, 174/47
International Classes:
E21B17/02; H01R4/60; H01R13/523; H01R4/58