US PATENT SUBCLASS 72 / 342.4
.~.~.~ And heating of tool

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

342.1  DF  WITH TEMPERATURE MODIFICATION OF TOOL OR OF SPECIFIED PORTION OF WORK {3}
342.2  DF  .~ Cooling {2}
342.3  DF  .~.~ Of tool {1}
342.4.~.~.~ And heating of tool

DEFINITION

Classification: 72/342.4

And heating of tool:

(under subclass 342.3) Subject matter also comprising localized heating (i.e., raising the energy level) of the tool.