US PATENT SUBCLASS 411 / 973
.~ Gravity bolthead, nut or washer

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}
973.~ Gravity bolthead, nut or washer

DEFINITION

Classification: 411/973

Gravity bolthead, nut or washer:

Art collection under art collection 955 wherein (a) the device is heavier on one side than the other, or (b) the device is seated in or carried by a washer heavier on one side than on the other.