Patents by Inventor Denis T. L. Leung

Denis T. L. Leung 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).

  • Corkscrew
    Patent number: 5220855
    Abstract: The present disclosure relates in general to a corkscrew and in particular to a corkscrew with a simplified arrangement to pierce into a cork and extract it from a bottle by way of a more effective member for centering the helical body of the corkscrew with respect to the cork.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: June 22, 1993
    Inventors: Denis T. L. Leung, Calvin T. T. Leung