US PATENT SUBCLASS 411 / 468
.~.~.~.~.~ Including opposed prongs defining mirror image of each other

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}
466  DF  .~.~.~ Prongs cut and formed from body portion {1}
467  DF  .~.~.~.~ Plural prongs from single opening {1}
468.~.~.~.~.~ Including opposed prongs defining mirror image of each other

DEFINITION

Classification: 411/468

Including opposed prongs defining mirror image of each other:

(under subclass 467) Subject matter wherein a penetrating end is struck from each of a pair of opposed ends of a single opening with the two penetrating ends being identical to each other while being oriented 180< deg.