US PATENT SUBCLASS 411 / 467
.~.~.~.~ Plural prongs from single opening

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.~.~.~.~ Plural prongs from single opening {1}
468  DF  .~.~.~.~.~> Including opposed prongs defining mirror image of each other

DEFINITION

Classification: 411/467

Plural prongs from single opening:

(under subclass 466) Subject matter wherein two or more penetrating ends are punched from a single opening in the sheet.