US PATENT SUBCLASS 604 / 311
.~.~.~ With piston or plunger for expelling material therefrom

Current as of: June, 1999
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604 /   HD   SURGERY

19  DF  MEANS FOR INTRODUCING OR REMOVING MATERIAL FROM BODY FOR THERAPEUTIC PURPOSES (E.G., MEDICATING, IRRIGATING, ASPIRATING, ETC.) {7}
289  DF  .~ Treating material applied to or removed from external surface of body, or cutaneous layer of skin (e.g., eye treatment, removal of skin impurities, etc.) {11}
310  DF  .~.~ Fluent treating material held in reservoir in hand-supported applicator {1}
311.~.~.~ With piston or plunger for expelling material therefrom

DEFINITION

Classification: 604/311

With piston or plunger for expelling material therefrom:

(under subclass 310) Subject matter wherein a ram or a ram actuator ejects the body treating material from the container or reservoir during application.

SEE OR SEARCH THIS CLASS, SUBCLASS:

208+, and 218+, for details of piston operated syringes for injecting or withdrawing material to or from body.