US PATENT SUBCLASS 235 / 456
.~.~.~ Multiple column code

Current as of: June, 1999
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235 /   HD   REGISTERS

435  DF  CODED RECORD SENSORS {9}
439  DF  .~ Particular sensor structure {8}
454  DF  .~.~ Optical {10}
456.~.~.~ Multiple column code

DEFINITION

Classification: 235/456

Multiple column code:

(under subclass 454) Subject matter wherein the coded indicia utilizes more than one column to represent an item of intelligence.