Electronic key system

Details Electronic key system Electronic key system

2006-05-09

2006-05-09

Horabik, Michael (Department: 2635)

Communications: electrical

Selective

Intelligence comparison for controlling

C340S005200, C340S005220

Reexamination Certificate

active

07042332

ABSTRACT:
An electronic key system has a portable apparatus, an operation control device and an update control device. The portable apparatus selectively transmits a first signal and a second signal. The operation control device authorizes an operation of a key based on reception of the first signal. The update control device transmits an update signal in a private region of the owner of the portable apparatus. The portable apparatus has a counter and a portable apparatus controller. When receiving the update signal, the portable apparatus controller resets the counter. When the counting value of the counter is equal to or less than a predetermined limit value, the controller selects the first signal as a signal to be transmitted. When the counting value is in excess of the limit value, the controller selects the second signal as a signal to be transmitted.

REFERENCES:
patent: 5767784 (1998-06-01), Khamharn
patent: 5973611 (1999-10-01), Kulha et al.
patent: 6043753 (2000-03-01), Okayasu et al.
patent: 6329901 (2001-12-01), Brinkmeyer et al.
patent: 6577226 (2003-06-01), Steiner
patent: 6700476 (2004-03-01), Okada et al.
patent: 196 43 759 (1998-04-01), None
patent: 197 53 401 (1999-06-01), None
patent: 0 716 399 (1996-06-01), None
patent: 1 031 480 (2000-08-01), None
European Search Report, dated Feb. 10, 2005, issued in corresponding European Application No. EP 03002307.

Affiliated with

Also associated with

Rating

Electronic key system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic key system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic key system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3620069