Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-01-15
2008-01-15
Nguyen, Tu X. (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S410000, C455S411000
Reexamination Certificate
active
07319875
ABSTRACT:
A communications system contains a base station (8) with a transmitter/receiver unit (10) for communication signals and a transmitter unit (14) for location interrogation signals; a response transmitter (20) with a transmitter/receiver unit (22) for the communication signals, and a receiver unit (26) for location interrogation signals. An interior space (2) which is located within the operating range of the communications system has walls (4) which are impermeable to one frequency range. The communication signals are transmitted and received in a frequency range to which the walls 4 are permeable. The location interrogation signals are transmitted in the frequency range to which the walls are impermeable.
REFERENCES:
patent: 6157810 (2000-12-01), Georges et al.
patent: 6337661 (2002-01-01), Kondoh et al.
patent: 2003/0122727 (2003-07-01), Koshizaka et al.
patent: 42 40 426 (1994-06-01), None
patent: 198 27 586 (1998-06-01), None
patent: 0 153 613 (1989-04-01), None
patent: 0 153 613 (1989-04-01), None
Brand Christian
Hofbeck Klaus
Greenberg Laurence A.
Locher Ralph E.
Nguyen Tu X.
Siemens Aktiengesellschaft
Stemer Werner H.
LandOfFree
Method for interior-space/exterior-space detection of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for interior-space/exterior-space detection of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for interior-space/exterior-space detection of a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2752234