Title:
Automatic hole filler and indicator
United States Patent 3384178


Inventors:
Agnew, James W.
Henderson, Morris E.
Metcalf, Bernie B.
Westmoreland, Fred A.
Application Number:
US57926166A
Publication Date:
05/21/1968
Filing Date:
09/14/1966
Assignee:
GULF OIL CORP
Primary Class:
Other Classes:
166/54, 166/75.11, 175/25, 175/207, 175/218
International Classes:
E21B21/08
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