US PATENT SUBCLASS 72 / 208
.~ With tool inside hollow work

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

199  DF  BY USE OF ROLLER OR ROLLER-LIKE TOOL-ELEMENT {17}
208.~ With tool inside hollow work {1}
209  DF  .~.~> Comprising plug acting on longitudinally moving work

DEFINITION

Classification: 72/208

With tool inside hollow work:

(under subclass 199) Subject matter including an additional tool means that acts on an inside surface of hollow work*.