US PATENT SUBCLASS 220 / 714
.~.~.~ With valve means

Current as of: June, 1999
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220 /   HD   RECEPTACLES

694  DF  CONTAINER ATTACHMENT OR ADJUNCT {21}
703  DF  .~ Drinking device {6}
711  DF  .~.~ Removable closure having specific drinking means {3}
714.~.~.~ With valve means {1}
715  DF  .~.~.~.~> Finger operated

DEFINITION

Classification: 220/714

With valve means:

(under subclass 711) Subject matter wherein the passage of liquid is controlled by a mechanical regulating device.