US PATENT SUBCLASS 411 / 372
.~.~ And separate attaching or retaining means

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

337  DF  HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP {12}
371.2  DD  .~ Washer adjacent head and having a particular shape (e.g., dished) or composition {1}
372.~.~ And separate attaching or retaining means

DEFINITION

Classification: 411/372

And separate attaching or retaining means:

(under subclass 371) Subject matter provided with separate distinct means to join or maintain the washer or cap with the fastening means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

533, for a washer provided with means capable of retaining the washer to a fastener.