US PATENT SUBCLASS 411 / 465
.~.~.~.~.~.~ Having sawtooth penetrating edge

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

439  DF  IMPACT DRIVEN FASTENER, E.G., NAIL, SPIKE, TACK, ETC. {13}
457  DF  .~ Multiple prong, e.g., nailing plate, staple, etc. {8}
461  DF  .~.~ Of sheet metal {2}
462  DF  .~.~.~ Including stiffening means {1}
463  DF  .~.~.~.~ Rib {1}
464  DF  .~.~.~.~.~ Entire fastener having corrugations parallel to driving direction {1}
465.~.~.~.~.~.~ Having sawtooth penetrating edge

DEFINITION

Classification: 411/465

Having sawtooth penetrating edge:

(under subclass 464) Subject matter wherein a penetrating edge of the fastener is defined by a series of lateral sharp points disposed in parallel relationship to the alternating ridges and grooves.