Patents by Inventor David K. Powers

David K. Powers 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).

  • Electric battery
    Patent number: D350725
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: September 20, 1994
    Assignee: Power Battery Holdings Corporation
    Inventors: David K. Powers, Michael Mahan, David Persen, Thomas Clary