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7577420 |
Instant help security system for emergency help using 2G, 2.5G and 3G cellular wirelesses half duplex call
A security system ( 52 ) using cellular wireless half duplex communication call ( 62 ) is provided. The security system ( 52 ) comprises a set of monitored resources ( 10 ), group of owners ( 48 )...
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7428311 |
Method and apparatus for boosting an audible signal in a notification system
The present invention is an apparatus and a concomitant method for boosting the audio signal generated by at least one notification appliance in a supervised emergency voice evacuation system.
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7346933 |
Ultrasonic sensor component signal communication to standalone universal serial bus keyboard emulator for entry/exit computer proximity determination
A device in one example comprises a standalone universal serial bus keyboard emulator and an ultrasonic sensor component. The standalone universal serial bus keyboard emulator is coupled with a...
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7289023 |
Supervised guard tour tracking systems and methods
The present invention comprises systems and methods for addressing exceptions (i.e., alarms) associated with a guard tour according to a predefined hierarchy. The exception is generated...
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7286048 |
Supervised guard tour systems and methods
The present invention comprises systems and methods for addressing exceptions (i.e., alarms) associated with a guard tour according to a predefined hierarchy. The exception is generated...
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6727815 |
Fire alarm system
A fire alarm system may comprise a control center, a wired communication pathway connected to the control center, and a relay station having a receiver and a signal evaluation circuit connected to...
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6687487 |
Repeater for transmission system for controlling and determining the status of electrical devices from remote locations
A repeater for use in a two way communication system for retransmitting information between a first device and a second device to help ensure reliable two way communication between the devices,...
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4550306 |
Signal transmission system for fire alarm junction line
A novel signal transmission system, having a junction line comprised of a power source line, a grounding line and a signal line is disclosed. Two complementarily operative transistors are connected...
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4117404 |
System of communications to alert police personnel of trouble on expressways
A system involving transmitters adapted for mounting on trucks, buses, etc. and capable of energizing at least one transceiver along a highway which in turn sends a signal to a police control...
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3882491 |
PERSONAL SECURITY SYSTEM
A distress signaling monitoring system is disclosed. The system includes a plurality of monitoring units coupled to a central station by wire or by radio. Each monitoring unit relays a distress...
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RE12364 |
Title is not available
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RE11678 |
Title is not available
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RE06244 |
Title is not available
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