US PATENT SUBCLASS 72 / 370.27
.~.~ Forming holes in tube

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}
370.27.~.~ Forming holes in tube

DEFINITION

Classification: 72/370.27

Forming holes in tube:

(under subclass 367.1) Process in which an opening is formed in the tube's* wall.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324+, for a process of cutting a tube.