US PATENT SUBCLASS 399 / 30
.~.~.~ By concentration detector

Current as of: June, 1999
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399 /   HD   ELECTROPHOTOGRAPHY

9  DF  DIAGNOSTICS {13}
24  DF  .~ Consumable {3}
27  DF  .~.~ Toner {3}
30.~.~.~ By concentration detector

DEFINITION

Classification: 399/30

By concentration detector:

(under subclass 27) Subject matter wherein the need for replenishment or replacement is determined by a means or method that analyzes a ratio of toner particles to carrier particles.

SEE OR SEARCH THIS CLASS, SUBCLASS:

58+, for concentration control.