US PATENT SUBCLASS 209 / *
.~.~.~.~ Bubbles

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

132  DF  FLUID SUSPENSION {2}
155  DF  .~ Liquid {5}
162  DF  .~.~ Floating {3}
163  DF  .~.~.~ Buoyant material {2}
*.~.~.~.~ Bubbles {2}
164  DF  .~.~.~.~.~> Processes {2}
168  DF  .~.~.~.~.~> Apparatus {2}