The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1999
Filed:
Apr. 07, 1997
Marc R Simon, Whitefish Bay, WI (US);
Charles J Luebke, Sussex, WI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A keyless control system is disclosed which may be employed to gain entry to a motor vehicle and start an engine. When using this system, a user activates a remote control by selecting a function for the motor vehicle to perform. In response, a challenge number is exchanged and used in an encryption algorithm by both the remote control and a control circuit in the motor vehicle to produce independently of each other separate algorithm answers. A first verification indication is produced when the control circuit finds both answers to be the same. The remote control also sends its unique remote control identification and a designation of the selected function to the control circuit. If the received remote control identification matches is on an authorized remote control list stored in the control circuit, a second verification indication is produced. When both the first and second verification indications are produced, the control circuit issues a signal that causes the motor vehicle to perform the selected function.