US PATENT SUBCLASS 264 / 156
.~.~.~ Plurality of holes

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

138  DF  WITH SEVERING, REMOVING MATERIAL FROM PREFORM MECHANICALLY, OR MECHANICALLY SUBDIVIDING WORKPIECE {10}
154  DF  .~ Making hole or aperture in article {1}
155  DF  .~.~ By punching or drilling {1}
156.~.~.~ Plurality of holes

DEFINITION

Classification: 264/156

(under subclass 155) Processes where two or more holes are formed in each article.