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.