US PATENT SUBCLASS 210 / 90
.~ Fluid pressure responsive

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

85  DF  WITH ALARM, INDICATOR, REGISTER, RECORDER, SIGNAL OR INSPECTION MEANS {7}
90.~ Fluid pressure responsive

DEFINITION

Classification: 210/90

(under subclass 85) Apparatus responsive to fluid pressure.