Identification systems employing frequency-based coded information
First Claim
1. An identification system for an object having a disabled state, said identification system comprising:
- a disabling circuit operatively associated with the identification system so that when said disabling circuit reaches a pre-determined state, the object achieves its disabled state;
a transmitter transmitting a set of signals simultaneously over a plurality of frequencies for a period of time at least once during a succession of time intervals using frequency-based coding; and
a receiver configured to receive the set of signals over the plurality of frequencies simultaneously transmitted by said transmitter, said receiver causing the disabling circuit to disable the object when said receiver does not receive at least a pre-determined number of consecutive signals over a plurality of frequencies from said transmitter.
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Accused Products
Abstract
An identification or protection system for vehicles, doors, lights and other electronic objects possessing a disabled state, having a disabling circuit operatively associated with the identification system so that when said resulting circuit is activated, the object achieves its disabled state; a transmitter transmitting a signal for a period of time at least once during a succession of time intervals using frequency-based coding; a receiver configured to receive the signal transmitted by the transmitter, the receiver causing the disabling circuit to disable the object when the receiver does not receive a number of consecutive signals from said transmitter which exceeds a pre-determined threshold.
69 Citations
21 Claims
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1. An identification system for an object having a disabled state, said identification system comprising:
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a disabling circuit operatively associated with the identification system so that when said disabling circuit reaches a pre-determined state, the object achieves its disabled state; a transmitter transmitting a set of signals simultaneously over a plurality of frequencies for a period of time at least once during a succession of time intervals using frequency-based coding; and a receiver configured to receive the set of signals over the plurality of frequencies simultaneously transmitted by said transmitter, said receiver causing the disabling circuit to disable the object when said receiver does not receive at least a pre-determined number of consecutive signals over a plurality of frequencies from said transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A protective system for preventing theft of an object having a disabled state, said protective system comprising:
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a disabling circuit operatively associated with an electrical system of the object so that when said disabling circuit reaches a pre-determined state, the object is electronically disabled; a transmitter transmitting a set of signals simultaneously over a plurality of frequencies for a period of time at least once during a succession of time intervals using frequency-based coding; and a receiver connected with said disabling circuit and configured to receive the set of signals over the plurality of frequencies simultaneously transmitted by said transmitter, said receiver causing the disabling circuit to disable the object when said receiver does not receive at least a pre-determined number of consecutive signals over a plurality of frequencies from said transmitter. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for providing security for an object having a disabled state, the system comprising:
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a disabling circuit operatively connected to the object for causing the object to achieve the disabled state; a transmitter having a multi-frequency signal generator for simultaneously transmitting a plurality of signals each being modulated at a plurality of different frequencies in a frequency-based coding scheme; and a receiver having a plurality of filters with outputs, with each filter separating a respective one of the plurality of signals simultaneously transmitted from the transmitter according to the frequency-based coding scheme, wherein the receiver causes the disabling circuit to disable the object when the receiver does not receive at least a pre-determined number of consecutive signals from the transmitter at the output of each filter corresponding to the frequency-based coding scheme. - View Dependent Claims (20, 21)
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Specification