US PATENT SUBCLASS 48 / 191
.~ Regulating pressure

Current as of: June, 1999
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48 /   HD   GAS: HEATING AND ILLUMINATING

190  DF  DISTRIBUTION {3}
191.~ Regulating pressure

DEFINITION

Classification: 48/191

Means for reducing and regulating the pressure of gas in a distributing system.

SEE OR SEARCH CLASS

137, Fluid Handling,

494+, particularly subclasses 505+ for fluid-pressure regulators, per se.