A two-way broadcasting system and method by which the amount of accesses from the reception side can be controlled with certainty by the broadcasting side and a receiving apparatus for use with the method wherein, information of a reply to a question from a broadcasting side is transmitted...http://www.google.fr/patents/US5794118?utm_source=gb-gplus-shareBrevet US5794118 - Two-way broadcasting and receiving method with time limit and/or limit data
Two-way broadcasting and receiving method with time limit and/or limit data ...
