Title:
Heater for oil wells and pipe lines
United States Patent 2608256
US Patent References:
/0798504.html
- - 0798504

Oil-well heater
- - 1776997

Electric oil well tubing heater
- - 2525314


Inventors:
Matthews, Don T.
Publication Date:
08/26/1952
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Assignee:
Matthews, Don T.
Primary Class:
166/60
Other Classes:
392/301, 166/61, 166/62
International Classes:
E21B36/04; E21B36/00