Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-01-04
2005-01-04
La, Anh V. (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S573400, C340S572100
Reexamination Certificate
active
06838992
ABSTRACT:
A method, system and a badge utilized therein utilize both the radio frequency (RF) and infrared (IR) parts of the electromagnetic spectrum to locate subjects (i.e. objects and persons) within a tracking environment. The system includes a battery-operated, microprocessor-based badge for each subject to be located. Each badge automatically transmits: (1) shorter interval, digitized, infrared light signals to identify a delimited area zone of its subject's location; (2) shorter interval, digitized, lower power RF signals to provide a local area zone of its subject's location; and (3) longer interval, digitized, higher power RF signals to provide a wide area zone of its subject's location. Each badge transmits uniquely identifiable IR and higher power RF signals upon actuation of one or more push button switches integrated on the badge or a change of state of one or more external switch connections. Each higher power, longer interval, RF signal is a “supervisory” pulse. This pulse informs a host computer that the badge is in range of an RF receiver and is functional.
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Brooks & Kushman P.C.
La Anh V.
Versus Technology, Inc.
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