A method and system for determining the television consumption habits of a test population by obtaining data relating to the program being viewed and/or recorded and transmitting the data through telephone connection to a central computer for evaluation. The data is obtained in a manner which enables...http://www.google.com.au/patents/US5034902?utm_source=gb-gplus-sharePatent US5034902 - Method and system for ascertaining the consumption habits of a test population
