This invention intends to provide a system which makes it easy to search an object by making a number of a procedure of input as less as possible in a case that a factor of an area is regarded as important in searching an object. In order to attain this object an object to be searched is stored in advance...http://www.google.com.hk/patents/US6738785?utm_source=gb-gplus-share專利 US6738785 - Search unit, search system and search method
