US PATENT SUBCLASS 411 / 440
.~ Having means to facilitate explosive driving

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}
440.~ Having means to facilitate explosive driving {1}
441  DF  .~.~> Discrete guide or centering means

DEFINITION

Classification: 411/440

Having means to facilitate explosive driving:

(under subclass 439) Subject matter provided with means specially adapted for allowing the fastener to be driven by fluent pressure resulting from an explosive charge detonation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

532, for washer provided with explosive release means.