US PATENT SUBCLASS 411 / 525
.~.~.~ Having plural longitudinal slits

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}
525.~.~.~ Having plural longitudinal slits {2}
526  DF  .~.~.~.~> And slit coincident with element axis
527  DF  .~.~.~.~> And helically inclined tongues, e.g., speed nut, etc.

DEFINITION

Classification: 411/525

Having plural longitudinal slits:

(under subclass 520) Subject matter wherein the material is provided with at least two long narrow cuts both of which are parallel to the longitudinal axis of the structure.