US PATENT SUBCLASS 235 / 450
.~.~.~ Strengthen or diminish field or flux

Current as of: June, 1999
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235 /   HD   REGISTERS

435  DF  CODED RECORD SENSORS {9}
439  DF  .~ Particular sensor structure {8}
449  DF  .~.~ Magnetic {1}
450.~.~.~ Strengthen or diminish field or flux

DEFINITION

Classification: 235/450

Strengthen or diminish field or flux:

(under subclass 449) Subject matter wherein a sensing magnetic field or flux is increased or decreased in intensity in accordance with elements on or in the record representative of coded indicia.