Patents by Inventor Richard Parnell Nygren

Richard Parnell Nygren 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).

  • Patent number: D441651
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: May 8, 2001
    Inventor: Richard Parnell Nygren