Title:
Method and apparatus useful in repairing wells
United States Patent 2365794

Inventors:
Armentrout, Arthur L.
Werts, Richard A.
Publication Date:
12/26/1944
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Assignee:
Armentrout, Arthur L.
Werts, Richard A.
Primary Class:
73/40.50R
Other Classes:
138/90, 73/152.360
International Classes:
E21B47/10