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:
Feb. 23, 2010
Filed:
Aug. 17, 2005
Karl Mueller, Rottweil-Neufra, DE;
Johannes Mattes, Fridingen, DE;
Uwe Hipp, Inzigkofen-Engelwies, DE;
Dietmar Weisser, Tuttlingen, DE;
Michael Geber, Bad Urach, DE;
Markus Ruther, Ostfildern, DE;
Andreas Pohlmann, Weil der Stadt, DE;
Matthias Reinhardt, Sindelfingen, DE;
Karl Mueller, Rottweil-Neufra, DE;
Johannes Mattes, Fridingen, DE;
Uwe Hipp, Inzigkofen-Engelwies, DE;
Dietmar Weisser, Tuttlingen, DE;
Michael Geber, Bad Urach, DE;
Markus Ruther, Ostfildern, DE;
Andreas Pohlmann, Weil der Stadt, DE;
Matthias Reinhardt, Sindelfingen, DE;
Marquardt GmbH, Rietheim-Weilheim, DE;
Abstract
A locking system for providing authorization to access and drive a motor vehicle has a first control device for unlocking and locking the car doors, the ignition lock, the steering wheel lock, etc. Additionally, the locking system has a second device, which is an electronic key or an identifier. The two devices have transmission means and/or receiving means for electromagnetic signals with frequencies ν lying in a frequency band between two cut-off frequencies νa, νb. At least one of the signals, transmitted between the devices, is a coded operating signal for authenticating the second device. The actual frequency νi with which the transmission means of the second device is operated is stored in a storage means of the first device.