Theft Detection System

1 . A theft detection system comprising:

a theft detection device configured to be coupled to a product, the theft detection device including a receiver configured to receive a signal, and a controller;

wherein the controller is configured to determine whether the signal received by the receiver includes a code;

wherein the theft detection device has a first state and a second state; and

wherein the controller is configured to transition the theft detection device from the first state to the second state when the controller determines that the signal received by the receiver includes the predetermined code.

2 . The theft detection system of claim 1 , wherein the theft detection device includes an alarm emitter;

wherein when the theft detection device is in the first state, the controller causes the alarm emitter to emit an alarm signal when the theft detection system is not coupled to a product; and

wherein when the theft detection device is in the second state, the controller does not cause the alarm emitter to emit an alarm signal when the theft detection system is not coupled to a product.

3 . The theft detection system of claim 1 , further comprising an emitter configured to emit a signal including the code;

wherein the emitter is a light emitter configured to emit a signal including the code by turning on and off a plurality of times.

4 . The theft detection system of claim 1 , wherein the theft detection device includes a sound emitter;

wherein the receiver is a light sensor; and

wherein the controller causes the sound emitter to emit an indicator sound to indicate the transition of the theft detection device from the first state to the second state.

5 . A theft detection system comprising:

a theft detection device configured to be coupled to a product, the theft detection device including a receiver configured to receiver a signal and a controller configured to determine whether the signal received by the receiver includes a code, the controller being configured to deactivate the theft detection device when the controller determines that the receiver has received a signal that includes the code; and

an emitter configured to emit a signal including the code.

6 . The theft detection system of claim 5 , wherein the receiver of the theft detection device is a light sensor configured to sense a light level.

7 . The theft detection system of claim 6 , wherein emitter is a light emitter; and

wherein the emitter emits a signal including the code by turning on for a first time period, turning off for a second time period, and turning on for a third time period.

8 . The theft detection system of claim 6 , wherein the theft detection device includes an alarm emitter and a motion sensor configured to determine when the theft detection device is in motion; and

wherein the theft detection device is configured to emit an alarm signal when the theft detection device is in motion and the light level sensed by the light sensor is below a predetermined level for more than a predetermined time period.

9 . The theft detection system of claim 5 , wherein the controller is configured to be reprogrammed with a second code.

10 . The theft detection system of claim 9 , wherein the emitter is reconfigurable to emit the second code.

11 . The theft detection system of claim 5 , wherein the emitter includes an trigger configured to be actuated to cause the emitter to emit a signal including the code.

12 . The theft detection system of claim 5 , wherein the controller does not deactivate the theft detection device if a signal received by the receiver does not include the code.

13 . The theft detection system of claim 5 , wherein the emitter is a radio frequency signal emitter; and

wherein the receiver is configured to receive a radio frequency signal.

14 . A method of providing theft detection systems comprising:

providing a theft detection device configured to be coupled to a product, the theft detection device having a first state in which it is configured to detect theft and a second state in which it is not configured to detect theft, the theft detection device including a receiver configured to receive a signal including a first code and a controller configured to determine whether to cause the theft detection device to enter the second state based on the signal received by the receiver; and

providing an emitter configured to emit the signal including the first code.

15 . The method of claim 14 , wherein the receiver is a light sensor; and

wherein the emitter is a light emitter.

16 . The method of claim 15 , wherein the signal emitted by the emitter comprises a light pattern.

17 . The method of claim 16 , wherein the signal emitted by the first emitter comprises a first predetermined period of light emission, followed by a second predetermined period of not emitting light, followed by a third predetermined period of light emission.

18 . The method of claim 14 wherein the controller is configured to be reprogrammed to cause the theft detection device to enter the second state when the receiver receives a signal containing a second code different from the first code.

19 . The method of claim 14 , wherein the theft detection device includes an alarm emitter and an indicator configured to indicate to the controller whether the theft detection device is coupled to a product;

wherein the alarm emitter is configured to emit an alarm signal when the theft detection device is in the first state and the indicator indicates that the theft detection device is not coupled to a product.

20 . The method of claim 14 , further comprising providing a remover configured to remove the theft detection device from a product after the theft detection device enters the second state.