The present invention relates to an interactive communication system, such as an interactive cable television system (10), for providing an interactive information output over a common output channel from a plurality of remotely transmitted different information inputs (22, 24, 26, 28, 30) and, more...http://www.google.com/patents/US4573072?utm_source=gb-gplus-sharePatent US4573072 - Method for expanding interactive CATV displayable choices for a given channel capacity
