A method and system for contactless exchange of information between a read/write unit and at least one information carrier, using wireless radiofrequency signal transmission including an input/output circuit and associated coil device and the information carrier including another input/output circuit...http://www.google.com.au/patents/US6014088?utm_source=gb-gplus-sharePatent US6014088 - Method and system for contactless exchange of data between a read/write unit and one or more information carriers
