A method and apparatus for controlling and communicating with business office devices, such as copiers, facsimiles and/or printers. The present invention communicates and controls various modules of business devices which allow an external device such as an operation panel to access the state of a target...http://www.google.com.tw/patents/US5412779?utm_source=gb-gplus-share專利 US5412779 - Method and apparatus for controlling and communicating with business office devices
