US Patent 10325394 Mobile communication terminal and data input method

A communication terminal includes a transceiver to receive first touch information from a counterpart terminal, the first touch information having coordinate information of a touch input inputted by a user of the counterpart terminal, the coordinate information being identified based on a coordinate of the touch input on an image displayed on the counterpart terminal. An image signal processor of the communication terminal controls the first touch information to be displayed on a display of the communication terminal, and controls image information corresponding to the image displayed on the counterpart terminal to be displayed on the display in association with the first touch information, and controls the first touch information to be displayed on the image information.