US PATENT SUBCLASS 428 / 581
.~.~.~.~ Only one plane of symmetry

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

544  DF  ALL METAL OR WITH ADJACENT METALS {31}
577  DF  .~ Intermediate article (e.g., blank, etc.) {3}
578  DF  .~.~ Panel having nonrectangular perimeter {2}
580  DF  .~.~.~ Symmetrical {1}
581.~.~.~.~ Only one plane of symmetry

DEFINITION

Classification: 428/581

(under subclass 580) Subject matter in which the mirror can be placed in only one position to reveal the symmetry.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

607, for an axle and torque tube casing having structure limited to uses of that class.