Patents by Inventor Diana Caldwell

Diana Caldwell 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: D354852
    Type: Grant
    Filed: January 22, 1992
    Date of Patent: January 31, 1995
    Assignee: Diana Caldwell
    Inventors: Frank H. Goddard, Diana Caldwell