Paging activated electronic security system

• US 5,966,081 A
• Filed: 09/24/1997
• Issued: 10/12/1999
• Est. Priority Date: 09/24/1997
• Status: Expired due to Term

• Current Assignee: Chesnutt R. Van
• Original Assignee: Chesnutt R. Van
• Inventors: Chesnutt, R. Van
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): JEANGLAUDE, JEAN BRUNER
• Application Number:
  US08/937,058
• Time in Patent Office: 748 Days
• Field of Search: 307/10.1, 307/10.3, 307/10.4, 307/10.5, 307/10.6, 307/10.7, 340/825.31, 340/825.34, 340/825.44, 340/539, 455/343, 455/38.2, 395/200.3
• US Class Current: 340/5.64
• CPC Class Codes: G06F 21/88 Detecting or preventing theft or loss
• CPC Class Codes: G06F 2211/1097 Boot, Start, Initialise, Power
• CPC Class Codes: G08B 13/1409 for removal detection of electrical appliances by detecting their physical disconnection from an electrical system, e.g. using a switch incorporated in the plug connector

Abstract

An antitheft system for use in portable consumer electronic equipment. The antitheft system includes an antitheft receiver that receives a deactivation code that is transmitted by a paging system transmitted when the device is reported stolen. Upon receipt of the deactivation code, a microprocessor within the electronic equipment causes the equipment to become inoperative. To ensure the antitheft receiver is not removed or tampered with, the microprocessor queries the antitheft receiver for a unique identification number associated with the device. If the identification number does not match a number that is stored within the equipment, the equipment assumes the antitheft receiver has been tampered with and causes the equipment to become inoperative

Claims

1. An antitheft system for incorporation into electronic equipment to disable the equipment if stolen, wherein the equipment includes a power-on self test (POST) processing circuit that executes a POST routine when activation power is applied to the electronic equipment, comprising:

a paging receiver that receives a paging signal that uniquely identifies the electronic equipment which is broadcast when the electronic equipment is discovered to be stolen, the paging receiver setting an internal condition within the antitheft system upon receipt of the paging signal that indicates that the equipment has been stolen. the POST processing circuit executing instructions that interact with the antitheft system to determine if the internal condition indicates that the equipment has been stolen, and if so, causing an error in the POST routine such that the equipment fails to boot, thus disabling the electronic equipment.

2. The antitheft system of claim 1, wherein as part of the POST routine, the POST processing circuit executes a sequence of instructions that cause the antitheft system to compare an internally stored code with a code stored in a non-volatile memory location within the electronic equipment and if the internally stored code does not match the code stored in the non-volatile memory, causes an error condition to be returned to the POST routine that prohibits the electronic equipment from booting, thus disabling the equipment.

3. The antitheft system of claim 1, wherein the electronic equipment is a portable computer.

4. The antitheft system of claim 1, wherein the electronic equipment is a motorized vehicle.

5. The antitheft system of claim 1, wherein the electronic equipment is military equipment.