Apparatus and method for preventing loss of a mobile telephone and for locating a lost mobile telephone
First Claim
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1. A system comprising;
- a mobile telephone having a proximity signal transmitter transmitting a radio-frequency proximity signal;
a base unit, formed as an article normally carried by a user of the mobile telephone, including a proximity signal receiver, and an alarm unit, wherein the proximity signal receiver receives the radio-frequency proximity signal when the base unit is carried by the user with the mobile telephone additionally being carried by the user separately from the base unit, and wherein the alarm unit provides a perceivable alarm indication when the mobile telephone is out of range for the radio-frequency proximity signal to be received by the proximity signal receiver.
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Abstract
A system includes a mobile telephone, such as a cellular telephone, and a base unit that is formed as an article that is ordinarily worn by the user of the telephone. The telephone transmits a radio-frequency proximity signal that is received in the base unit, which sounds an alarm if the distance between the telephone and the base unit increases so that the proximity signal is not received. The base unit may also generate a radio-frequency signal causing the telephone to produce an audible signal so that it can be easily found.
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Citations
20 Claims
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1. A system comprising;
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a mobile telephone having a proximity signal transmitter transmitting a radio-frequency proximity signal;
a base unit, formed as an article normally carried by a user of the mobile telephone, including a proximity signal receiver, and an alarm unit, wherein the proximity signal receiver receives the radio-frequency proximity signal when the base unit is carried by the user with the mobile telephone additionally being carried by the user separately from the base unit, and wherein the alarm unit provides a perceivable alarm indication when the mobile telephone is out of range for the radio-frequency proximity signal to be received by the proximity signal receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A module comprising:
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a surface attachable to an external surface of a mobile telephone, a proximity signal transmitter transmitting a radio-frequency proximity signal, and a battery powering the location signal transmitter. - View Dependent Claims (18)
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19. Apparatus comprising:
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an access cover attachable to a mobile telephone, a proximity signal transmitter transmitting a radio-frequency proximity signal, and an electrical connection for attaching the proximity signal transmitter to a battery within the mobile telephone. - View Dependent Claims (20)
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Specification