US PATENT SUBCLASS 137 / 101.21
.~.~ Flow displacement element actuates electrical controller

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

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
98  DF  .~ Self-proportioning flow systems {5}
101.21.~.~ Flow displacement element actuates electrical controller

DEFINITION

Classification: 137/101.21

(under subclass 98) Subject matter comprising an electrical controller responsive to a flow displacement element.