Patents by Inventor Gregory V. Liu

Gregory V. Liu 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).

  • Cue stick bridge sleeve with self-cleaning wipers
    Patent number: 6066051
    Abstract: A pool cue having a sliding bridge sleeve with cleaning wipers provides for a smooth linear motion of the bridge sleeve while preventing frictional resistance due to contaminant buildup between the bridge sleeve bearings and the linear shaft of the pool cue.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: May 23, 2000
    Assignee: Hyper-Designs, Inc.
    Inventors: Gregory V. Liu, Gilbert I. Key, Thomas J. Hyson