US PATENT SUBCLASS 340 / 545.3
.~.~.~.~.~ Sensing of electromagnetic energy (e.g., light, infrared, or microwave)

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}
545.3.~.~.~.~.~ Sensing of electromagnetic energy (e.g., light, infrared, or microwave)

DEFINITION

Classification: 340/545.3

Sensing of electromagnetic energy (e.g., light, infrared, or microwave):

(under subclass 545.2) Subject matter in which the movement is sensed according to a detected level of radiant energy.

(1) Note. Conditions sufficient for classification herein include:

(a)

a specified type of electromagnetic energy which becomes present or absent at a sensor, or

(b)

a threshold change in a preexisting electromagnetic energy field which occurs at a sensor.

SEE OR SEARCH THIS CLASS, SUBCLASS: 552+, for intrusion detection by sensing the disturbance of electromagnetic waves in general.

SEE OR SEARCH CLASS

250, Radiant Energy, appropriate subclasses for general radiant energy responsive electric signaling without intrusion detection purpose.