US PATENT SUBCLASS 433 / 221
.~.~.~.~ Having surface grooves or ridges

Current as of: June, 1999
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433 /   HD   DENTISTRY

215  DF  METHOD OR MATERIAL FOR TESTING, TREATING, RESTORING, OR REMOVING NATURAL TEETH {6}
218  DF  .~ Crown {3}
219  DF  .~.~ Attachment to natural tooth or adjacent crown {1}
220  DF  .~.~.~ By post {1}
221.~.~.~.~ Having surface grooves or ridges

DEFINITION

Classification: 433/221

Having surface grooves or ridges:

(under subclass 220) Subject matter wherein the periphery of the elongated member is formed with one or more elongated

crests or flutes.

(1) Note. Threaded posts are included in this subclass.