(under the class definition) Device including a tool, the cutting edge of which is at least in part of material that is either a natural crystal or is the character of a natural crystal.
(1) Note. The "natural crystal" of this subclass definition is not intended to include a stone shaped as a cutting tooth.
SEE OR SEARCH CLASS
451, Abrading, for a machine including a crystalline cutting instrumentality other than as provided for in the definition of Class 408. (Note that Class 451 has not been screened for art proper for Class 408.)
