Anti-theft apparatus for vehicles

US4595902A · kind A · utility

Assignee

• Bayerische Motoren Werke A.G. · DE

Inventors

• Arnost Proske · Grafing, DE
• Walter Weishaupt · Munich, DE

Key dates

• Filing date: Dec 22, 1982
• Grant date: Jun 17, 1986
• Expiry date: Dec 22, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2009/00785
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In an anti-theft apparatus for vehicles with wireless transmission of the code signal, the latter is suitably overlapped outside of the vehicle by a secondary signal which is not to be received in or on the vehicle. This results in an effective protection against interception of the code signal.