US PATENT SUBCLASS 411 / 544
.~ Axially resilient

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

531  DF  WASHER STRUCTURE {11}
544.~ Axially resilient

DEFINITION

Classification: 411/544

Axially resilient:

(under subclass 531) Subject matter wherein the element is composed of elastic material and configured such that it can be axially compressed and will tend to return to its original shape.