US PATENT SUBCLASS 493 / 295
.~ Polygonal cross section tube

Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

269  DF  TUBE MAKING {15}
295.~ Polygonal cross section tube

DEFINITION

Classification: 493/295

Polygonal cross section tube:

(under subclass 269) Method or apparatus including forming a hollow cylinder having at least two planar longitudinally extending surfaces.