US PATENT SUBCLASS 604 / 28
.~.~ Method

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}
27  DF  .~ Material introduced into and removed from body through passage in body inserted means {7}
28.~.~ Method

DEFINITION

Classification: 604/28

Method:

(under subclass 27) Subject matter including processes wherein the body treating material enters and leaves the body through a channel or channels in a device inserted in a body.

(1) Note. To be classifiable in this subclass, a patent must claim the process of both injection and withdrawal of fluent material.