US PATENT SUBCLASS 396 / 125
.~ Processing circuit

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

89  DF  WITH EXPOSURE OBJECTIVE FOCUSING MEANS, FOCUSING AID, OR RANGEFINDING MEANS {28}
125.~ Processing circuit {3}
126  DF  .~.~> Null type or zero-difference type
127  DF  .~.~> Inflection point type
128  DF  .~.~> Image correlation type

DEFINITION

Classification: 396/125

Processing circuit:

(under subclass 89) Subject matter including details of an analyzing circuit that generates at least one signal for focusing or rangefinding.

SEE OR SEARCH THIS CLASS, SUBCLASS:

102, for a circuit generating a variable reference signal of an in-focus condition.