Marketing of goods and services on telephone lines and during a period from the commencement of a telephone call to the receipt and acceptance of that call (quiescent period) when the recipient of the call actuates his or her telephone. This quiescent period of time, during which a ringing signal is...http://www.google.com.au/patents/US20030086558?utm_source=gb-gplus-sharePatent US20030086558 - Telecommunication system using message presentation during a ringing signal period
