A method for discriminating the production background of products by a bar code system (related to Korean Patent Application No. 2000-12346) is disclosed, in which the production background of a desired product can be known quickly and easily by an ES code (environmental protection and safety code) marked...http://www.google.de/patents/US6581829?utm_source=gb-gplus-sharePatent US6581829 - Method for discriminating production background of product by bar code system
