US PATENT SUBCLASS 411 / 980
.~.~.~ Automatic

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

955  DF  LOCKED BOLTHEAD OR NUT {7}
974  DF  .~ Side lock {7}
979  DF  .~.~ Resilient {1}
980.~.~.~ Automatic {2}
981  DF  .~.~.~.~> Coiled washer
982  DF  .~.~.~.~> Spring-tongued washer plate

DEFINITION

Classification: 411/980

Automatic:

Art collection under art collection 979 wherein the locking mechanism engages and locks by the mere rotation of the device to the fastening position.