Patents by Inventor Wai S. Lai

Wai S. Lai 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).

  • Zero-defect data integrity in high-capacity transaction systems
    Patent number: 5450577
    Abstract: A failure rate independent system for achieving zero defect data integrity in a computer transaction system is disclosed. The system receives events from an event generator and stores the raw events to disk. Structural information relating events to transactions is not stored on disk. Data which is lost after a system failure is reconstructed from the raw events during recovery. Transaction processing capacity is increased by trading off the continual updating of disk stored events and associated structural information for the post recovery reconstruction of structural information. As a result, zero defect data integrity is achieved at minimum processing cost.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: September 12, 1995
    Assignee: AT&T Corp.
    Inventors: Wai S. Lai, Charles A. LaPadula