When a point on a tablet is designated by a marker, a recording indication signal is on, and recording of sound data is started. When the marker is released from the tablet, the recording indication signal is off, the recording of the sound data is finished, and coordinate data of the point and the sound...http://www.google.co.uk/patents/US7148883?utm_source=gb-gplus-sharePatent US7148883 - Information recording and reproducing apparatus
