US PATENT SUBCLASS 324 / 179
.~.~ Magnetic field sensor

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

160  DF  ELECTRICAL SPEED MEASURING {7}
178  DF  .~ Including "event" sensing means {2}
179.~.~ Magnetic field sensor

DEFINITION

Classification: 324/179

(under subclass 178) Subject matter in which the means responsive to the passage of an object is sensitive to magnetic field variations caused by passage of the object through magnetic field.