US PATENT SUBCLASS 72 / 370.26
.~.~.~ Polygon cross section (e.g., rectangular)


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  DF  .~.~ Change in cross section {2}
370.26.~.~.~ Polygon cross section (e.g., rectangular)


DEFINITION

Classification: 72/370.26

Polygon cross section (e.g., rectangular):

(under subclass 370.23) Process in which the tube* is deformed to produce a profile having three or more straight conjoining sides.