US PATENT SUBCLASS 470 / 33
.~.~.~.~ And pressure, e.g., forging

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

1  DF  PROCESS {5}
27  DF  .~ Making headed fastener, e.g., rivet or nail, etc. {2}
28  DF  .~.~ Rivet type {3}
32  DF  .~.~.~ Formed by heat treatment {1}
33.~.~.~.~ And pressure, e.g., forging

DEFINITION

Classification: 470/33

And pressure, e.g., forging:

(under subclass 32) Subject matter having an additional step of applying pressure to the fastener.