Telecommunications – Radiotelephone system – Including private cordless extension system
Patent
1993-01-14
2000-12-26
Cumming, William
Telecommunications
Radiotelephone system
Including private cordless extension system
379 59, H04M 127
Patent
active
061672785
ABSTRACT:
A special telephone instrument has a cordless hand-piece and one or more base-stations. Each base-station is hard-wire-connected with the ordinary telephone utility system and may include a built-in cellular transceiver. The hand-piece, which is powered by a built-in rechargeable battery, is--within its maximum cordless range (e.g., 500 feet)--connected with its nearest base-station via two-way radio transmission. When not in use, the hand-piece is at times resting in a cradle at its nearest base-station, thereby getting its battery recharged. When in use, the hand-piece is removed from its cradle. When so removed, the hand-piece may--while located within cordless range--be used for receiving and/or placing phone-calls via any one of the base-stations. When moved outside of cordless range, the hand-piece automatically converts to a cellular telephone, thereby permitting--not only the continuation of an ongoing conversation--but also the receiving and/or placing of telephone calls in any location served by a cellular telephone system. Thus, a person may have a base-station in his office whereat his cordless hand-piece is cradled most of the time during office hours, thereby maintaining the built-in battery fully charged. When he leaves his office, he would bring his cordless hand-piece (and his conversation) along; which hand-piece, after being removed outside of its cordless range, will automatically convert to a cellular telephone. Then, when he gets home after work, he would place his hand-piece into the cradle of another base-station; which hand-piece would automatically convert back to a regular cordless mode after having come within the cordless range of this other base-station.
REFERENCES:
patent: 4723265 (1988-02-01), Kamei et al.
patent: 4768218 (1988-08-01), Yorita
patent: 4887290 (1989-12-01), Dop et al.
patent: 4939769 (1990-07-01), Sakanishi et al.
patent: 4989230 (1991-01-01), Gillig et al.
patent: 5103474 (1992-04-01), Stoodley et al.
patent: 5127042 (1992-06-01), Gillig et al.
patent: 5151643 (1992-09-01), Emmert et al.
patent: 5173933 (1992-12-01), Jabs et al.
patent: 5204970 (1993-04-01), Stengel et al.
patent: 5210785 (1993-05-01), Sato et al.
patent: 5257283 (1993-10-01), Gilhousen et al.
patent: 5260988 (1993-11-01), Schellinger et al.
patent: 5319634 (1994-06-01), Bartholomew et al.
patent: 5396538 (1995-03-01), Hong
Motorola Brochure #BIM-298, 1992 "Micro T.A.C".
LandOfFree
Combination cordless-cellular telephone 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 Combination cordless-cellular telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combination cordless-cellular telephone system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1004912