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Methods and devices for protecting an article against theft

  • US 7,589,632 B2
  • Filed: 01/20/2004
  • Issued: 09/15/2009
  • Est. Priority Date: 01/23/2003
  • Status: Expired due to Fees
First Claim
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1. Method for protecting a commercial product against theft, in which a security unit has a monitoring mode in which theft protection is active such that a theft attempt will cause the security unit to switch to an alarm mode in which at least one of an acoustic and optical alarm is activated, the method comprising:

  • deactivating, in the monitoring mode, a receiver housed in the security unit outside of the commercial product; and

    activating the receiver when the security unit is shifted to the alarm mode, wherein the security unit has an on-state mode in which the receiver is activated and wherein the security unit is shifted from the on-state mode to a connect mode in which theft protection is not active when the receiver receives a signal from the transmitter, wherein, in the connect mode, the security unit is prepared for a shift to the monitoring mode, and wherein the security unit is shifted from the connect mode to the alarm mode if the security unit is not prepared within a preset time interval for a shift to the monitoring mode.

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