US PATENT SUBCLASS 250 / 569
.~.~.~.~ Card type

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  DF  .~.~.~ Digital information {2}
569.~.~.~.~ Card type

DEFINITION

Classification: 250/569

(under subclass 568) Subject matter wherein the record is a flat rectangular sheet.