US PATENT SUBCLASS 250 / 203.6
.~.~.~.~ Airborne target, or spaceborne target other than the sun (e.g., star or missile)

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}
203.6.~.~.~.~ Airborne target, or spaceborne target other than the sun (e.g., star or missile)

DEFINITION

Classification: 250/203.6

Airborne target, or spaceborne target other than the sun (e.g., star or missile):

(under subclass 203.3) Subject matter where the self-luminous target is a star or other spaceborne object other than the

sun, e.g., a missile exhaust plume.

(1) Note. The brightness of these objects is substantially lower than that of the Sun.