Apparatus and method for detecting and identifying hazardous material in a mail stream in which hazardous particulates or material in or on mail pieces in a mail stream are detected and the mail piece bearing the hazardous material is identified. A bar code applicator applies a unique bar code to the...http://www.google.de/patents/US7232070?utm_source=gb-gplus-sharePatent US7232070 - Chemical/biological hazard trigger with automatic mail piece tagging system and method
