Patents by Inventor Hanchi David Huang

Hanchi David Huang 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).

  • Communication protocol between a communication device and an external accessory
    Patent number: 6330247
    Abstract: A method and apparatus for communicating both voice and control data between a communication device (such as a cellular phone) and an external accessory (such as a hands-free kit) over a data bus. The method includes formatting a sequence of bits into a repeating sequence of first time slots and second time slots, transmitting the voice data in the first time slot, and transmitting the control data in the second time slot. Notably, a first bit of each of the second time slots comprises a clock bit that alternates between a high value and a low value (e.g. a ‘1’ or a ‘0’) as between consecutive second time slots.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: December 11, 2001
    Assignee: Qualcomm Incorporated
    Inventors: Chienchung Chang, Way-Shing Lee, Robert Opalsky, George Pan, Karthick Chinnaswami, Hanchi David Huang, Steven C. Den Beste, James Hutchison