US PATENT SUBCLASS 411 / 374
.~.~.~ By screw 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}
372.5  DD  .~ Cap over the head {2}
373  DF  .~.~ Attachable cap structure {4}
374.~.~.~ By screw means


DEFINITION

Classification: 411/374

By screw means:

(under subclass 373) Subject matter wherein the means for covering is attached by helical thread structure.