U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.

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Class 291/5 - Reversing

Subclass of Class 291 - Track sanders
Definition: Reversing means for fluid-pressure sand-delivery apparatus
No. of patents: 0