US PATENT SUBCLASS 24 / 421
.~.~.~.~ Resilient or spring biased element

Current as of: June, 1999
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24 /   HD   BUCKLES, BUTTONS, CLASPS, ETC.

381  DF  ZIPPER OR REQUIRED COMPONENT THEREOF {15}
415  DF  .~ Slider having specific configuration, construction, adaptation, or material {8}
418  DF  .~.~ Including position locking-means attached thereto {2}
420  DF  .~.~.~ Having surface engaging element shifted by reorientation of pull tab {1}
421.~.~.~.~ Resilient or spring biased element {4}
422  DF  .~.~.~.~.~> Selectively shifted by either of two pull tabs
423  DF  .~.~.~.~.~> With relatively movable link
424  DF  .~.~.~.~.~> Biased by distinct spring
425  DF  .~.~.~.~.~> Having aperture cooperating with guide post

DEFINITION

Classification: 24/421

Resilient or spring biased element:

(under subclass 420) Locking-means* wherein the interlocking surface engaging element is either (a) constructed to be resilient* (b) made from a resilient* material, or (c) is attached to a spring which pulls it toward an initial position.