US PATENT SUBCLASS 72 / 474
.~.~ Having nonsymmetrical faces

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

462  DF  TOOL AND/OR TOOL HOLDER {7}
470  DF  .~ Including tool couple or die couple (e.g., opposed die faces) {4}
474.~.~ Having nonsymmetrical faces {1}
475  DF  .~.~.~> Complementary faces

DEFINITION

Classification: 72/474

Having nonsymmetrical face:

(under subclass 470) Apparatus wherein the work-engaging surface of one tool of a tool-couple has a nonplanar shape of configuration different from the work-engaging surface of the other tool of said tool-couple.

(1) Note. For the purpose of this definition a tool-couple having mirror-image faces is considered to be symmetrical and a patent disclosing such tool faces will not be placed in this or indented subclasses, but will be found in subclass 470, or an appropriate subclass indented thereunder.