US PATENT SUBCLASS 34 / 529
.~.~.~.~ With photoelectric device

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

523  DF  APPARATUS {40}
524  DF  .~ With automatic control {11}
526  DF  .~.~ Of plural operations {3}
527  DF  .~.~.~ Of specific operational sequence {5}
529.~.~.~.~ With photoelectric device

DEFINITION

Classification: 34/529

With photoelectric device:

(under subclass 527) Apparatus combined with a means to provide a light and a means to sense the amount of light.