A multi-user touch system includes a surface on which are a pattern of mounted antennas. A transmitter transmits uniquely identifiable signals to each antenna. Receivers are capacitively coupled to different users, the receivers are configured to receive the uniquely identifiable signals. A processor...http://www.google.de/patents/US20020185981?utm_source=gb-gplus-sharePatent US20020185981 - MULTI-USER TOUCH SURFACE
