An on-line commerce method and apparatus. A user can select products for purchase from plural merchant servers by examining product information stored on a shopping server. The product information related to selected products is verified by accessing a checkout page of each merchant server. The verified...http://www.google.com.hk/patents/US6535880?utm_source=gb-gplus-share專利 US6535880 - Automated on-line commerce method and apparatus utilizing a shopping server verifying product information on product selection
