Personalized locator method and apparatus
First Claim
1. A method for locating an individual comprising the steps of:
- receiving in a Public Switched Telecommunications Network (PSTN) a sequence of digits identifying a passive transponder carried by the individual to be located;
transmitting, in response to receipt of the sequence of digits received in the PSTN, a first prescribed coded frequency signal that is unique to the passive transponder of the individual to be located such that only upon its receipt will the transponder decode the first prescribed coded frequency signal to produce electrical power to energize a transmitter associated with said transponder to transmit a second coded frequency signal that uniquely identifies the individual to be located; and
tracking, via direction-sensitive receivers, said second coded frequency signal to locate the individual.
5 Assignments
0 Petitions
Accused Products
Abstract
A concerned individual (12) seeking to locate a missing person (14) does so by dialing a special number associated with a locating service offered through a Public Switched Telecommunications Network (16). After dialing the special number, the concerned individual (12) enters a sequence of digits that correspond to a numeric identifier, such as social security number or telephone number, or the missing person (14). Upon receipt of the digit sequence, the PSTN (16) whether the missing person is a subscriber of the locating service, and if so, the PSTN causes one or more cell sites (28-28) of a wireless service communications system to broadcast a first coded frequency signal for receipt by a passive transponder (32) carried by the missing person. The passive transponder decodes the first coded frequency signal to yield electrical power to energize a transmitter (38) within the transponder to transit a second coded frequency signal for tracking by direction-sensitive receivers (33) to locate the missing person.
36 Citations
7 Claims
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1. A method for locating an individual comprising the steps of:
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receiving in a Public Switched Telecommunications Network (PSTN) a sequence of digits identifying a passive transponder carried by the individual to be located;
transmitting, in response to receipt of the sequence of digits received in the PSTN, a first prescribed coded frequency signal that is unique to the passive transponder of the individual to be located such that only upon its receipt will the transponder decode the first prescribed coded frequency signal to produce electrical power to energize a transmitter associated with said transponder to transmit a second coded frequency signal that uniquely identifies the individual to be located; and
tracking, via direction-sensitive receivers, said second coded frequency signal to locate the individual. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification