US PATENT SUBCLASS 411 / 458
.~.~ Oppositely disposed prongs

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}
458.~.~ Oppositely disposed prongs {2}
459  DF  .~.~.~> Having plural prongs on one end
460  DF  .~.~.~> Having identical ends

DEFINITION

Classification: 411/458

Oppositely disposed prongs:

(under subclass 457) Subject matter wherein two penetrating ends are situated 180< deg.
(1) Note. The fasteners of this and indented subclasses are intended to have a prong driven into a first workpiece and then have a second workpiece driven or forced onto another opposed prong.