US PATENT SUBCLASS 62 / 189
.~.~ By fluid flow, e.g., check valve

Current as of: June, 1999
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62 /   HD   REFRIGERATION

132  DF  AUTOMATIC CONTROL {19}
177  DF  .~ Of external fluid or means {6}
189.~.~ By fluid flow, e.g., check valve

DEFINITION

Classification: 62/189

(under subclass 177) Apparatus responsive to, or controlling, the flow of the external fluid, e.g., a check valve.

SEE OR SEARCH CLASS

137, Fluid Handling,

511+, for a check valve.