US PATENT SUBCLASS 137 / 80
.~.~.~ With additional diverse control

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

78.1  DF  AMBIENT CONDITION CHANGE RESPONSIVE {4}
78.5  DF  .~ Atmospheric {2}
79  DF  .~.~ Temperature {1}
80.~.~.~ With additional diverse control

DEFINITION

Classification: 137/80

(under subclass 79) Apparatus which also includes, in addition to the atmosphere temperature responsive element, an additional means for operating the control means.

(1) Note. See the class definition, Section 3 for search notes on automatic and combined automatic and nonautomatic control of fluid handling systems.