US PATENT SUBCLASS 411 / 475
.~.~ Having means to limit penetration short of bridge portion

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}
475.~.~ Having means to limit penetration short of bridge portion

DEFINITION

Classification: 411/475

Having means to limit penetration short of bridge portion:

(under subclass 457) Subject matter wherein means connecting the plural penetrating ends comprises a bridge portion and further wherein spaced from the bridge portion is a shoulder means specially adapted to maintain the bridge portion at a distance from the material into which the fastener is driven.