US PATENT SUBCLASS 156 / 580.2
.~.~.~ Specified structure of sonic or ultrasonic work contacting surface

Current as of: June, 1999
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156 /   HD   ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE

349  DF  SURFACE BONDING MEANS AND/OR ASSEMBLY MEANS THEREFOR {34}
580  DF  .~ Presses or press platen structures, per se {3}
580.1  DF  .~.~ With sonic or ultrasonic means {1}
580.2.~.~.~ Specified structure of sonic or ultrasonic work contacting surface

DEFINITION

Classification: 156/580.2

(under subclass 580.1) Apparatus wherein the structure of a work contacting surface which has means subjecting the work to sonic or ultrasonic vibration is specified other than merely flat.