Patents by Inventor Ellis Blackwell

Ellis Blackwell 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).

  • Handpiece for caries detection
    Patent number: 7270543
    Abstract: A dental implement is provided including a housing, a light source, a light detecting device, and a translucent member.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: September 18, 2007
    Assignee: Therametric Technologies, Inc.
    Inventors: George Kenneth Stookey, Kenneth Robert Dunipace, Bryan Ellis Blackwell, Masatoshi Ando
  • Floating plug for drawing of tubes
    Patent number: 5881592
    Abstract: A draw tool and process for producing internally finned copper tubing in which the draw tool has longitudinally extending exterior teeth and grooves having working surfaces that are shaped at interacting angles providing metal flow at tensile forces below the ultimate tensile strength of the tubing.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: March 16, 1999
    Assignee: Cerro Copper Products Co.
    Inventors: Ellis Blackwell, Darrell K. Maisel