Patents by Inventor Johannes Liou

Johannes Liou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Touch controlled device with pressure sensing electronic input pen
    Patent number: 6417845
    Abstract: A touch controlled device with a pressure sensing electronic input pen comprises a main control unit, a pressure signal processing unit, an electronic input pen, a coordinate and button signal processing unit, a touch control panel, and an output interface, etc. The main control unit serves to process the outputting signals from the pressure signal processing unit and the coordinate and button signal processing unit. The electronic input pen has a pressure sensor and a button, the pressure sensor serves to sense the force applied for being outputted with a pressure frequency signal. The touch control panel is connected to the coordinate and button signal processing unit, the tip of the electronic input pen touches the touch control panel so that the touch control panel outputs a coordinate signal and then transfers this signal to the coordinate and button signal processing unit.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: July 9, 2002
    Assignee: ET & T Technology Co., Ltd.
    Inventors: Jung-Yu Chen, Johannes Liou, Kevin Sun, Wei-Lin Wang