On-line purchasing of products from an electronic commerce (e.g., a Web page) seller is improved by providing samples to users at little or no cost in exchange for feedback that is provided to other users considering purchasing the product. A subset of products available for purchase from an electronic...http://www.google.de/patents/US7162437?utm_source=gb-gplus-sharePatent US7162437 - Method and apparatus for improving on-line purchasing
