US PATENT SUBCLASS 250 / 556
.~.~.~ Document verification or graph reader

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  DF  .~.~ Including coded record {2}
556.~.~.~ Document verification or graph reader

DEFINITION

Classification: 250/556

(under subclass 555) Subject matter wherein the document, which is a sheet-like article, is analyzed or tested for its authenticity by means of a photocell system; or comprising a record reader wherein the coded information is represented by

a graph or plot on the record.

SEE OR SEARCH CLASS

340, Communications: Electrical,

146.2, for devices having means for comparing items or intelligence with each other and for indicating a result in accordance with the comparison.

356, Optics: Measuring and Testing,

71, for analysis of document by comparison which includes a support for the document to be tested. 382, Image Analysis, appropriate subclass for pattern or character recognition systems, see Class 382 II B (1) Note.