US PATENT SUBCLASS 250 / 555
.~.~ Including coded record

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

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
206  DF  .~ Photocell controlled circuit {9}
555.~.~ Including coded record {2}
556  DF  .~.~.~> Document verification or graph reader
557  DF  .~.~.~> With means to position, direct, or detect record

DEFINITION

Classification: 250/555

(under subclass 206) Subject matter with data bearing means containing information in symbolic form where the symbols are arbitrarily given certain meanings, and means for illuminating said data bearing means prior to the photoelectric cell, or methods of using such means.

(1) Note. The coded record may be illuminated by a light source or it may be the source of illumination.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271, for invisible radiation responsive code readers.

566, for optical or pre-photocell-systems wherein the photocell does not control an electrical or electromechanical system.

SEE OR SEARCH CLASS

235, Registers, 454+, for coded record sensing devices utilizing light to sense the coded indicia on the record and including particular circuitry to process the electrical signals generated by the sensing process. The term processing of signals includes: (1) generation and utilization of timing signals and sync signals, (2) the storage of signals, and (3) the incorporation of means for counting.