US PATENT SUBCLASS 411 / 463
.~.~.~.~ Rib


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.~.~.~.~ Rib {1}
464  DF  .~.~.~.~.~> Entire fastener having corrugations parallel to driving direction {1}


DEFINITION

Classification: 411/463

Rib:

(under subclass 462) Subject matter wherein the stiffening means comprises an elongated embossment in the sheet metal defining a protruding portion on one face of the fastener and a recessed portion on the opposing face thereof.