US PATENT SUBCLASS 411 / 533
.~ Including means for retaining washer to fastener

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

531  DF  WASHER STRUCTURE {11}
533.~ Including means for retaining washer to fastener

DEFINITION

Classification: 411/533

Including means for retaining washer to fastener:

(under subclass 531) Subject matter wherein discrete means are provided for maintaining the element assembled to a fastener.