US PATENT SUBCLASS 411 / 437
.~.~ Interrupted

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

427  DF  INTERNALLY THREADED FASTENER ELEMENT, E.G., NUT, ETC. {5}
436  DF  .~ Thread structure {2}
437.~.~ Interrupted

DEFINITION

Classification: 411/437

Interrupted:

(under subclass 436) Subject matter wherein the helical ridge has a discontinuity.