US PATENT SUBCLASS 250 / 568
.~.~.~ Digital information

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}
566  DF  .~.~ Including coded record {1}
568.~.~.~ Digital information {2}
569  DF  .~.~.~.~> Card type
570  DF  .~.~.~.~> Tape, drum, or disc types

DEFINITION

Classification: 250/568

(under subclass 566) Subject matter where the date consist of discrete identical indicia and is represented by the relative positional locations of the indicia on the record.

SEE OR SEARCH CLASS

340, Communication: Electrical,

146.2, for means for comparing signals or information in digital form to determine which is the greater, the lesser, or whether they are numerically equal.