US PATENT SUBCLASS 411 / 461
.~.~ Of sheet metal

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.~.~ Of sheet metal {2}
462  DF  .~.~.~> Including stiffening means {1}
466  DF  .~.~.~> Prongs cut and formed from body portion {1}

DEFINITION

Classification: 411/461

Of sheet metal:

(under subclass 457) Subject matter wherein the fastener is formed from sheet metal.

(1) Note. The fastener is usually formed by cutting or stamping.

SEE OR SEARCH THIS CLASS, SUBCLASS:

477+, for single prong impact driven fasteners formed from sheet metal.

503, for sheet metal formed plural legged headed fastener elements.