Patents by Inventor Lisa A. Helmer

Lisa A. Helmer 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).

  • Filter for a visual display monitor
    Patent number: D463779
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: October 1, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Paul J. Cobian, Susan M. Olson, Scott G. Theirl, Lisa A. Helmer