Patents by Inventor Michael Warren Held

Michael Warren Held 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).

  • Drill bore bit
    Patent number: D507585
    Type: Grant
    Filed: September 13, 2003
    Date of Patent: July 19, 2005
    Inventor: Michael Warren Held