US PATENT SUBCLASS 250 / 203.5
.~.~.~.~ Cathode-ray tube scanning

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

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
201.1  DF  .~ Photocell controls its own optical systems {8}
203.1  DF  .~.~ Following a target (e.g., a star or instrument pointer or other object) other than a pattern {2}
203.3  DF  .~.~.~ Self-luminous target {4}
203.5.~.~.~.~ Cathode-ray tube scanning

DEFINITION

Classification: 250/203.5

Cathode-ray tube scanning:

Subject matter under 203.3 in which the self luminous target followed is a spot of light on the face of a cathode-ray tube (CRT).