US PATENT SUBCLASS 411 / 528
.~.~.~ Having longitudinal slit coincident with element axis

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

511  DF  FASTENER SECURING ELEMENT {3}
516  DF  .~ Resilient metallic {3}
520  DF  .~.~ Sheet metal {5}
528.~.~.~ Having longitudinal slit coincident with element axis

DEFINITION

Classification: 411/528

Having longitudinally slit coincident with element axis:

(under subclass 520) Subject matter wherein the material is provided with a long narrow cut lying in the longitudinal axis of the structure.