Patents by Inventor Jia-Chung Tang

Jia-Chung Tang 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).

  • Testing of USB hub
    Patent number: 6393588
    Abstract: A test apparatus for testing function of a USB hub under the control of a USB host computer is provided. The USB host computer issues a USB command during the test. The test apparatus includes a USB bus, an emulation device, a standard bus and a micro-controller device. The USB bus is coupled to the USB hub. The emulation device emulates an USB device connected to the USB bus. The standard bus is connected to the USB host computer. The micro-controller device is connected to the standard bus and the emulation device respectively to process a USB transaction corresponding to the USB command. The invention provides a testing environment which is fully compliant to the WINDOWS 98 environment.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: May 21, 2002
    Assignee: Windbond Electronics Corp.
    Inventors: Liang-Hao Hsu, Chih-Cheng Shen, Chao-Ting Kao, Jia-Chung Tang