Patent ID: 6819220
Filing Date: 2004-11-16
Classification: G08B,H04B,H04M

Abstract:
An apparatus for exchanging messages between portable devices of the same kind, comprising:a means for inputting signal containing message; a means for entering a desired reproduction time of the message; a means for storing the inputted message and the entered reproduction time; a means for communicating data with another portable device; a means for checking for signals from another portable device and for checking, based upon receipt of a signal being transmitted from another portable device through said communicating means, whether or not said another portable device is a device of the same kind which is designated as the counterpart device for exchanging with each other; a means for generating a sound if said another portable device is identified as the counterpart device for exchanging with each other, and the level of the received signal exceeds a first level; and a means for transmitting data containing the message and its reproduction time stored in said storing means to said another portable device when said another portable device is identified as the counterpart device for exchanging with each other based upon the signal being received from said another device and the level of the signal being received from said another portable device exceeds a second level which is higher than the first level.