A system, apparatus, method and computer program product to obtain comprehensive vehicle radio listener statistics based on parameters such as radio status (e.g., on/off status and CD/Tape/AM/FM setting), radio volume, station preset information, current frequency setting (i.e., station identification),...http://www.google.de/patents/US20050221774?utm_source=gb-gplus-sharePatent US20050221774 - System and method for obtaining comprehensive vehicle radio listener statistics
