A description is given of an electronic auction machine, which reacts to changing sales conditions with appropriately adjusted machine prices. For existing automatic vending machines restocking is based upon very vague experience figures and in particular customary fluctuations in sales are not taken...http://www.google.com.hk/patents/US6012834?utm_source=gb-gplus-share專利 US6012834 - Apparatus and method for automatic self-adapting control of sales and adjustment of prices to market movements in an automatic vending machine
