Patent ID: 6130860
Filing Date: 2000-10-10
Classification: G04G

Abstract:
An electronic device including a transmitter and a receiver, wherein:(i) said transmitter comprises:elapsed time measuring means for measuring an elapsed time which has elapsed since a set point of time;time information storing means for storing information on a plurality of elapsed times;storage controlling means, responsive to a user performing a specified process, for controlling said elapsed time measuring means to measure a particular elapsed time related to the specified process at a time that the specified process is performed by the user, and for controlling said time information storing means to store the particular elapsed time related to the user-performed specified process; andcontrolling/transmitting means, responsive to an instruction of transmission input by the user, for calculating information on a plurality of time differences each between the particular elapsed time measured by said elapsed time measuring means when the instruction of transmission was input by the user and a respective one of the plurality of elapsed times whose information is stored in said time information storage means, and for transmitting to said receiver information on the calculated plurality of time differences; and(ii) said receiver comprises:current time measuring means for measuring a reference signal to obtain information on a current time;receiving means for receiving the information on the transmitted plurality of time differences; andcalculating means for calculating a plurality of times at which the specified process was performed by said transmitter, based on the information on the plurality of time differences received by said receiving means and information on the current time obtained by said current time measuring means.