US PATENT SUBCLASS 250 / 222.2
.~.~.~.~ Particle detection

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216  DF  .~ Optical or pre-photocell system {11}
221  DF  .~.~ Controlled by article, person, or animal {1}
222.1  DF  .~.~.~ Inanimate article {3}
222.2.~.~.~.~ Particle detection

DEFINITION

Classification: 250/222.2

Particle detection:

(under subclass 222.1) Subject matter in which the article is a particle.

SEE OR SEARCH CLASS

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,

10+, for particle counting.