US Patent 7310657 Owner identification of collaboration work object

To easily identify the owner of an object currently drawn on a collaboration work area, or an object already drawn thereon, to easily carry out an editing operation for the object of each owner by selectively identifying the object drawn by a particular owner. A user management table registers the node identification code and the owner identifier of a user system therein, and an object management table registers the node identification code and object information therein. Based on an event entry for an object, the node identification code of the object management table is obtained, and the owner identifier of the user management table is obtained. This owner identifier is displayed on a screen by relating it to the object.