US PATENT SUBCLASS 470 / 15
.~.~.~.~.~ And prong

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}
11  DF  .~.~ Bolt {1}
12  DF  .~.~.~ Having specific configuration {4}
14  DF  .~.~.~.~ Hollow bolt type {1}
15.~.~.~.~.~ And prong

DEFINITION

Classification: 470/15

And prong:

(under subclass 14) Subject matter wherein the fastener is further provided with a portion structured as a penetrating end to allow the fastener to be used as impact driven fastener.