Patents by Inventor Hulhung Lu

Hulhung Lu 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).

  • Method and an apparatus for establishing the functional capabilities for wireless communications between a base unit and a remote unit
    Patent number: 5267244
    Abstract: In a wireless communication system between a base unit and a remote unit, the base unit transmits periodically a sync signal in a first selected time period in a selected frequency channel. The remote unit scans the frequency channels to detect the sync signal. The remote unit transmits a response signal in the selected frequency channel. The response signal is transmitted in a second selected time period different from the first selected time period. In addition, the remote unit transmits a first control signal encoded by a first code in the selected frequency channel in a third selected time period, different from the first and second selected time periods, containing a set of functional capabilities of the remote unit. The base unit receives and decodes the first control signal to derive the set of functional capabilities of the remote unit and compares it to its own set of functional capabilities to determine a common set of functional capabilities.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: November 30, 1993
    Assignee: Teknekron Communications Systems, Inc.
    Inventors: David G. Messerschmitt, Christopher Flores, Hulhung Lu