U.S. patents available from 1976 to present.
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Device for improving the security of an access system equipped with an identification means and an identifier, for a motor vehicle

Patent 6765471 Issued on July 20, 2004. Estimated Expiration Date: Icon_subject March 31, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Keyless entry system for automatically operating automotive door locking devices without manual operation
Patent #: 4763121
Issued on: 08/09/1988
Inventor: Tomoda ,   et al.

Vehicle security system based on two step communication range between transmitter and receiver
Patent #: 5602535
Issued on: 02/11/1997
Inventor: Boyles, et al.

Keyless access control device
Patent #: 5723911
Issued on: 03/03/1998
Inventor: Glehr

Procedure for operating a locking system for lockable objects
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Inventor: Hettich, et al.

Hands-free system for unlocking and/or opening an openable member of a motor vehicle
Patent #: 5929769
Issued on: 07/27/1999
Inventor: Garnault

Method for preventing misuse of transponders left inside a vehicle
Patent #: 5969597
Issued on: 10/19/1999
Inventor: Weigl, et al.

Door lock control apparatus for a vehicle
Patent #: 6002341
Issued on: 12/14/1999
Inventor: Ohta, et al.

Method of locating an enabling component containing a transponder, and a motor vehicle with a corresponding locator
Patent #: 6087987
Issued on: 07/11/2000
Inventor: Bachhuber, et al.

System and method for remote convenience function control having a rekey security feature Patent #: 6130622
Issued on: 10/10/2000
Inventor: Hussey, et al.

Inventors

Assignee

Application

No. 09540494 filed on 03/31/2000

US Classes:

340/5.61, Wireless transceiver340/5.64Wireless transmitter

Examiners

Primary: Horabik, Michael
Assistant: Nguyen, Nam

Attorney, Agent or Firm

Foreign Patent References

  • 19738323.8-51 DE 02/01/1997
  • 19735658.3-51 DE 08/01/1997
  • 93402710.3 EP 04/01/1993

International Classes

G05B 1900
G06F 700
G08B 2900
A04B 100
H04Q 900

Abstract

A device for improving the security of a “hands-free” access system for a motor vehicle, the system comprising an identification device installed on the vehicle and able to control the locking the opening leaves of the vehicle, and at least one identifier intended to be worn or carried by a user and capable of setting up a remote exchange of data with the identification device so as to control the locking means, when the identification device has authenticated the identifier, the identification means being intended, after a locking command, to send an interrogation signal into the cabin of the vehicle and receive in response a “present” signal from each identifier still present in the cabin, wherein, when a “present” signal is received by the identification device, the identification device sends into the cabin an inhibit signal which is received and stored in memory by each identifier present in the cabin.

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