US PATENT SUBCLASS 428 / 66.6
.~ Aperture containing

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

64.1  DF  CIRCULAR SHEET OR CIRCULAR BLANK {8}
66.6.~ Aperture containing

DEFINITION

Classification: 428/66.6

Aperture containing:

(under subclass 64.1) Product which has a through opening.

SEE OR SEARCH CLASS

411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threa-ded Fastener,

531+, for washers to be used with a fastener of Class 411.