US PATENT SUBCLASS 411 / 457
.~ Multiple prong, e.g., nailing plate, staple, etc.

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.~ Multiple prong, e.g., nailing plate, staple, etc. {8}
458  DF  .~.~> Oppositely disposed prongs {2}
461  DF  .~.~> Of sheet metal {2}
469  DF  .~.~> Multipart
470  DF  .~.~> Having prongs of different length
471  DF  .~.~> Each prong bevelled from a single side toward its opposite side {1}
473  DF  .~.~> Having distinct driving head {1}
475  DF  .~.~> Having means to limit penetration short of bridge portion
476  DF  .~.~> Having frangible portion

DEFINITION

Classification: 411/457

Multiple prong, e.g., nailing plate, staple, etc.:

(under subclass 439) Subject matter wherein the fastener is provided with a plurality of distinct connected penetrating ends.

SEE OR SEARCH CLASS

16, Miscellaneous Hardware,

16, for strip type multiple prong carpet fasteners.

59, Chain, Staple, and Horseshoe Making,

77, for staple blank structures and process of making staples. See the notes or Class 59, subclass 77 for the line between that subclass and this class (411).