US PATENT SUBCLASS 470 / 9
.~.~ Screw

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

1  DF  PROCESS {5}
8  DF  .~ Making externally threaded fastener, e.g., screw or bolt {2}
9.~.~ Screw {1}
10  DF  .~.~.~> Forming thread

DEFINITION

Classification: 470/9

Screw:

(under subclass 8) Subject matter wherein the fastener comprises an externally threaded fastener having threads which converge to a point on an end of the fastener.