US PATENT SUBCLASS 411 / 993
.~.~.~.~ bolthead- or nut-held

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}
991  DF  .~.~ Transversely sliding {1}
992  DF  .~.~.~ Key, plate, or bar {2}
993.~.~.~.~ bolthead- or nut-held

DEFINITION

Classification: 411/993

Bolthead- or nut-held:

Art collection under art collection 992 wherein the locking mechanism is held in place by the device.