Patents by Inventor Zhengya Zhu

Zhengya Zhu 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).

  • System and method for database synchronization
    Patent number: 6581075
    Abstract: A method of maintaining synchronization among multiple databases is provided. The method includes the steps of receiving a data update request for a data record at a database, and comparing a timestamp of the data record to a timestamp of the data update request. The data in the data record is updated with the data update request if the timestamp of the data update request is substantially greater than the timestamp of the data record. Otherwise, the data in the data record is updated with the data update request if the operational priority of the data update request is higher than the operational priority of the data record. Alternatively, the data in the data record is updated with the data update request if the node priority of the data update request is higher than the node priority of the data record.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: June 17, 2003
    Assignee: Nortel Networks Limited
    Inventors: Parthasarathy Guturu, Jatinder Pal, Thomas E. Heaven, Zhengya Zhu, William J. Jordan, Helmut Beffert, Ray McNamara