Title:
Control system
United States Patent 2869475


Inventors:
Bobo, Roy A.
Application Number:
US26287351A
Publication Date:
01/20/1959
Filing Date:
12/21/1951
Assignee:
PHILLIPS PETROLEUM CO
Primary Class:
Other Classes:
137/155, 200/83L, 200/84C, 222/67
International Classes:
E21B34/06; E21B43/12
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