Tracking mobile users in wireless networks

Tracking system and method for tracking a movable object carryin

Translation and connection device for radio frequency point of s

Transmission power control method in cellular radiotelephone sys

Transmission system for still-picture TV telephone

Transmission trunk multichannel dispatch system with priority qu

Transportable mobile cellular system

Trunk dialing converter

Trunked talk-group assignment method

TV phone communication system and apparatus therefor

Two-directional call forwarding device

Ultrasonic proximity detector for a telephone device

Ultrasonic radiotelephone for an automobile

Unit for preventing an interception of a radio communication sig

Universal connection for cellular telephone interface

Universal PSTN page entry protocol

Use of RSSI indication for improved data transmission over amps

User selectable response to an incoming call at a mobile station

Vehicle sun visor telephone

Vehicle telephone with call answering and recording means