US PATENT SUBCLASS 222 / 413
.~.~.~ Screw with terminal outlet only

Current as of: June, 1999
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222 /   HD   DISPENSING

251  DF  WITH DISCHARGE ASSISTANT (E.G., IMPELLER, PUMP, CONVEYER, MOVABLE TRAP CHAMBER, ETC.) {30}
410  DF  .~ Rotary {3}
412  DF  .~.~ Helically arranged projections (e.g., screws) {1}
413.~.~.~ Screw with terminal outlet only

DEFINITION

Classification: 222/413

(under subclass 412) Dispensers having the sole discharge point at or near the end of the screw.