Infra-red security system
Patent 4751396 Issued on June 14, 1988. Estimated Expiration Date: 
January 20, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 20, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesVehicle operator security system Coded control for vehicle engine ignition circuit Patent #: 4413261 InventorsAssigneeApplicationNo. 07/004908 filed on 01/20/1987US Classes:307/10.3, Ignition or starting circuit lock340/543, Permutation340/825.72, Wireless link398/108, Interrogator system398/172, Including visible light modulation398/40EAVESDROPPINGExaminersPrimary: Shoop, William M. Jr.Assistant: Logan, Sharon D. Attorney, Agent or FirmInternational ClassesG07C 9/00 (20060101)G08B 1/08 (20060101) G08B 1/00 (20060101) B60R 25/04 (20060101) AbstractAn electronic security system which includes an infrared (IR) transmitter operable to broadcast a digital identification code signal at a pre-selectable programmable baud rate. Also included is an IR receiver responsive to the identification code signal received at the programmed baud rate. Further included is a comparator within the receiver to compare the received IR signal and its baud rate with baseline references. The comparator is operably coupled with an ignition circuit when the pre-selected code and baud rate matches the received digital code and baud rate. Both said transmitter and receiver are held within enclosures that are, on their external surfaces, IR transparent and visible light opaque. The internal surfaces of said enclosures are IR reflective. | |
