Patents by Inventor Barbara J. Ringstrom

Barbara J. Ringstrom 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).

  • IV safety device
    Patent number: D491661
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: June 15, 2004
    Inventor: Barbara J. Ringstrom