The present invention relates to a method and apparatus for automatically delivering a combination of products from a vending machine at a package price. The method of the present invention includes the step of receiving a package identifier. The method also includes the steps of identifying a set of...http://www.google.com.hk/patents/US6397193?utm_source=gb-gplus-share專利 US6397193 - Method and apparatus for automatically vending a combination of products
