Patents by Inventor William G. Lewis

William G. 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).

  • Toner conveyor
    Patent number: 4011835
    Abstract: A toner conveyor comprising a plurality of helical springs joined together to form an endless train movable through a tube, the train having nested therein at spaced intervals, a plurality of floats which form in combination with the tube a plurality of chambers for moving toner.
    Type: Grant
    Filed: May 25, 1976
    Date of Patent: March 15, 1977
    Assignee: Xerox Corporation
    Inventor: William G. Lewis