In a method of maintaining security in a common output means such as a print server and a system for maintaining security for realizing the method of maintaining security, an output request unit serving as a client sends the output process, i.e., a job to be processed, to an output unit such as a print...http://www.google.co.uk/patents/US5638511?utm_source=gb-gplus-sharePatent US5638511 - Method of maintaining security in a common output means and system for maintaining security
