US PATENT SUBCLASS 340 / 547
.~.~.~.~.~ Magnetic sensor

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
541  DF  .~.~ Intrusion detection {8}
545.1  DF  .~.~.~ Door or window movement {6}
545.2  DF  .~.~.~.~ Specified sensor {6}
547.~.~.~.~.~ Magnetic sensor

DEFINITION

Classification: 340/547

Magnetic sensor:

(under subclass 545.2) Subject matter in which movement is detected by a device containing or responsive to, a magnet or electromagnet.