US PATENT SUBCLASS 451 / 165
.~.~.~ Ultrasonic

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


451 /   HD   ABRADING

64  DF  MACHINE {12}
162  DF  .~ Reciprocating tool {2}
164  DF  .~.~ Rectilinear {9}
165.~.~.~ Ultrasonic

DEFINITION

Classification: 451/165

Ultrasonic:

(under subclass 164) Abrading machine wherein the grinding tool is vibrated at a frequency higher than that heard by the human ear (i.e., above about 20,000 cycles per second).