The invention relates to a method for data processing device exchanging data with computer, including: a computer sends a enquiring message of the device's type to the data processing device; after receiving the message, the control module sends the information about the device's type of the data processing...http://www.google.de/patents/US7739429?utm_source=gb-gplus-sharePatent US7739429 - Method for data processing device exchanging data with computer
