Patents by Inventor Chi-Hwey Chang

Chi-Hwey Chang 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).

  • Patent number: 6791466
    Abstract: An apparatus for providing wireless transmission of information in electronic display systems and methods of using the same. In particular, the present invention is directed to an air interface and protocol to facilitate wireless transmission of information from a communication base station or other controlling device to individual electronic display modules.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: September 14, 2004
    Assignee: NCR Corporation
    Inventors: Chi-Hwey Chang, Yoshitaka Utsumi, Giovanni Vannucci, Stephen A. Wilkus, Gregory A. Wright
  • Patent number: 5894478
    Abstract: The present invention encompasses an apparatus and method for supporting multiple wireless data communication networks between a wireless communications device and a fixed communications device or another wireless communications device. Two network elements compose the physical apparatus, a protocol converter and a router. Upon receiving packet data from a fixed communications device, a router will locate a destination wireless communications device. The router will then convert the packet data to a format usable by the wireless data network that the wireless communications device is currently using for wireless access. After conversion, the router will perform actual transmission of the packet data to the correct destination wireless network. Once the converted packet data is received by the wireless network base station, it will be transmitted via RF to the destination wireless communications device.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: April 13, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Farhad Barzegar, Chi-Hwey Chang, Albert Chow, Gregory M. Durant, Danny K. Hsu, Xiaojian Huang, Jesse Eugene Russell, Robert Edward Schroeder