Patents by Inventor George T. Lewis

George T. Lewis 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).

  • Breathing mask
    Patent number: D250131
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: October 31, 1978
    Assignee: Chemetron Corporation
    Inventors: George T. Lewis, John H. Price