Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2000-06-07
2001-10-30
Wu, Daniel J. (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S571000, C340S686100, C340S649000, C340S573300, C340S691300, C340S546000
Reexamination Certificate
active
06310550
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to security systems, and more particularly, but not by way of limitation, to security systems which detect:
a) the opening of an enclosure of an electronic device;
b) the disconnection of a peripheral device from the electronic device;
c) the disconnecting of the electronic device from a power source; or
d) the removal of the electronic device from a network security loop or predefined location.
BACKGROUND
Household and office security systems are well known in the art. Typically such systems provide sensors which communicate with a controller. The sensors are typically infrared sensors keyed by body heat, sound sensors keyed by noise, or pressure and magnetic sensors keyed by the opening of doors and windows for sensing the presence of intruders. An alarm condition is declared by the controller when one of the sensors sends the controller a signal indicative of the alarm condition. In response to receiving such signal, the controller sets a local alarm to scare off the intruder and/or transmits an alarm signal to a subscriber company which watches for such alarm conditions.
Although these alarm systems are well known, the theft of components or exchange of components of electronic equipment is a commonplace problem. These prior art alarm systems are ineffective to stop the theft or exchange of electronic equipment because the intruder is typically authorized to be in the office or in the home. In other words, the intruder is authorized to be in the office or in the home but is unauthorized to be removing or exchanging components of electronic equipment.
In view of the foregoing, there is a need for a security system that can detect the unauthorized removal or exchange of components of electronic equipment. It is to such a security system that the present invention is directed.
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Dunlap Codding & Rogers P.C.
Gratzon Fred N.
Nguyen Tai T.
Wu Daniel J.
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