Method for preventing misuse of transponders left inside a vehicle

US5969597A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andreas Weigl · Linkenheim-Hochstetten, DE
• Peter Hauler · Karlsruhe, DE
• Karl-Ernst Weiss · Ettlingen, DE
• Uwe Feuchter · Stuttgart, DE
• Clemens Schroff · Gondelsheim, DE
• Tobias Klaiber · Leinfelden, DE
• Thomas Riehemann · Bühlertal, DE

Key dates

• Filing date: Aug 13, 1998
• Grant date: Oct 19, 1999
• Expiry date: Aug 13, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T70/5978
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method for preventing misuse of a transponder left inside a vehicle, which is part of a keyless vehicle access system and coacts with a control system for access and driving authorization located in the vehicle. The control system emits, in response to a locking command, a check signal by way of which it is ascertained whether transponders are still located in the vehicle interior after locking. Transponders which are detected as being located in the vehicle interior after locking are recorded in a memory associated with the control system. Upon a subsequent legitimate access to the vehicle, transponders that are not again detected in the interior are inhibited.