Title:
Oil well heater
United States Patent 3045099
US Patent References:
Oil well heater
- - 1835400

Oil well heater
- - 1915895

Oil well heater
- - 2893490


Inventors:
Bowman, Virgil R.
Keefe, Ray J.
Publication Date:
07/17/1962
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Assignee:
Bowman, Virgil R.
Keefe, Ray J.
Primary Class:
392/302
Other Classes:
166/60, 338/231
International Classes:
E21B36/04; E21B36/00