Patents by Inventor Robert D Stephens

Robert D Stephens 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).

  • System for sono-catalytic production of hydrogen
    Patent number: 7141216
    Abstract: A device for producing hydrogen includes a container housing a water-based solution and a metal constituent. A generator ultrasonically irradiates the water-based solution in the presence of the metal constituent to produce hydrogen gas.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: November 28, 2006
    Assignee: General Motors Corporation
    Inventor: Robert D Stephens