US PATENT SUBCLASS 396 / FOR 727
.~.~ Having log expansion (354/427)

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FOR 710  DF  AUTOMATIC EXPOSURE CONTROL SYSTEM OR DEVICE (354/410) {8}
FOR 725  DF  .~ Having log transformation circuit (354/425) {3}
FOR 727.~.~ Having log expansion (354/427)

DEFINITION

Classification: 396/FOR.727

Having log expansion: (354/427)

Subject matter under subclass FOR 725 in which the logarithmic voltage or current is inversely transformed to its original value.