US PATENT SUBCLASS 4 / 380
.~.~.~.~ By pressure or suction control of valve

Current as of: June, 1999
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4 /   HD   BATHS, CLOSETS, SINKS, AND SPITTOONS

300  DF  FLUSH CLOSET {22}
353  DF  .~ Tank only {9}
378  DF  .~.~ With outlet valve {6}
379  DF  .~.~.~ With delay of valve closing {6}
380.~.~.~.~ By pressure or suction control of valve

DEFINITION

Classification: 4/380

By pressure of suction control of valve:

(under subclass 379) Subject matter wherein the movable element is held open by the direct application of pressure or suction to the movable element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

407, for tank outlet valves actuated by pressure variation.