US PATENT SUBCLASS 72 / 370.23
.~.~ Change in cross section

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

362  DF  PROCESS {8}
367.1  DF  .~ Tube making or reshaping {11}
370.23.~.~ Change in cross section {2}
370.24  DF  .~.~.~> Change in circular tube diameter {1}
370.26  DF  .~.~.~> Polygon cross section (e.g., rectangular)

DEFINITION

Classification: 72/370.23

Change in cross section:

(under subclass 367.1) Process in which the tube's profile is dimensionally modified.

SEE OR SEARCH THIS CLASS, SUBCLASS:

370.01+, for a process of changing the cross section using an internal tool.