Global Patent Index - EP 0994998 A1

EP 0994998 A1 2000-04-26 - ANTI-THEFT DEVICE FOR VEHICULE

Title (en)

ANTI-THEFT DEVICE FOR VEHICULE

Title (de)

DIEBSTAHLSCHUTZSYSTEM FÜR EIN KRAFTFAHRZEUG

Title (fr)

SYSTEME ANTIVOL POUR VEHICULE

Publication

EP 0994998 A1 (DE)

Application

EP 98928073 A

Priority

  • DE 9800880 W
  • DE 19718764 A

Abstract (en)

[origin: DE19718764C1] The theft protection system includes a transmission- and reception unit (2) arranged in the motor vehicle (1), which is electrically connected with at least two antennas (3), arranged separately of each other in the motor vehicle. A query signal is sent out through the antennas, and a transponder (5) sends out a response signal, if it receives the query signal. An evaluation unit (9) in the transmission- and reception unit evaluates the received response signal, and compares it with nominal values. A control unit arranged in the transmission- and reception unit supplies a query signal to the at least two antennas, dependent respectively on a combination of transmission parameters, whereby the query signal is transferred in dependence on the transmission parameters in at least two different transmission channels, and the parameters are changed in dependence on the response signal.

IPC 1-7 (main, further and additional classification)

E05B 49/00; B60R 25/00; H01Q 1/32

IPC 8 full level (invention and additional information)

B60R 25/24 (2013.01); G07C 9/00 (2006.01)

CPC (invention and additional information)

G06K 19/0712 (2013.01); B60R 25/24 (2013.01); G06K 19/0707 (2013.01); G07C 9/00309 (2013.01); G07C 2009/00793 (2013.01)

Citation (search report)

See references of WO 9850652A1

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

DE 19718764 C1 19980827; BR 9808744 A 20001003; EP 0994998 A1 20000426; WO 9850652 A1 19981112

INPADOC legal status


2002-04-17 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20011002

2000-04-26 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991019

2000-04-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB