The present invention includes a system and method of electronically executing transactions with a preprogrammed main computer having data and image storage and retrieval equipment. A plurality of electronic images of works of art which are for sale are created by at least one listing dealer and stored...http://www.google.com.hk/patents/US5664111?utm_source=gb-gplus-share專利 US5664111 - Computerized, multimedia, network, real time, interactive marketing and transactional system
