US PATENT SUBCLASS 411 / 390
.~ Single element having means facilitating or effecting separation

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

378  DF  EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC. {16}
390.~ Single element having means facilitating or effecting separation {1}
391  DF  .~.~> By fluent pressure

DEFINITION

Classification: 411/390

Single element having means facilitating or effecting separation:

(under subclass 378) Subject matter wherein an initially single piece fastening means includes means or structure allowing or producing its separation into plural segments.