US PATENT SUBCLASS 470 / 130
.~.~ Having spiral shank forming means

Current as of: June, 1999
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470 /   HD   THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS

110  DF  APPARATUS FOR MAKING HEADED FASTENER, E.G., NAIL, RIVET, ETC. {13}
121  DF  .~ Wire nail making {6}
130.~.~ Having spiral shank forming means

DEFINITION

Classification: 470/130

Having spiral shank forming means:

(under subclass 129) Subject matter further with means capable of producing a helical rib on the fastener.