Patents by Inventor David W. Leong

David W. Leong 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).

  • Drafting plotter
    Patent number: D302551
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: August 1, 1989
    Assignee: Hewlett-Packard Company
    Inventors: David W. Leong, Timothy A. Longust