US PATENT SUBCLASS 72 / 370.14
.~.~ Changing wall thickness

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}
370.14.~.~ Changing wall thickness {1}
370.15  DF  .~.~.~> Increasing wall thickness

DEFINITION

Classification: 72/370.14

Changing wall thickness:

(under subclass 367.1) Process in which the transverse dimension of the tube's* metal* is varied.