Patents by Inventor Thomas H. Howells

Thomas H. Howells 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: D311607
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: October 23, 1990
    Assignee: Vitalograph, Inc.
    Inventor: Thomas H. Howells