Patents by Inventor Brett Mitchell

Brett Mitchell 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).

  • Pressure relief port
    Patent number: 6176776
    Abstract: A pressure relief port has a tubular housing 11 in which a hollow valve body 12 is mounted. An upper poppet valve 23 is operatively mounted to the top of the valve body and a lower poppet valve 25 is operatively mounted to the bottom of the valve body. The interior of the valve body communicates with one end of the tubular housing through the upper poppet valve while the exterior communicates with the other end of the tubular housing through the lower poppet valve.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: January 23, 2001
    Assignee: Kason Industries, Inc.
    Inventors: Burl Finkelstein, Brett A. Mitchell
  • Modular block for retaining wall
    Patent number: D313280
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: December 25, 1990
    Assignee: 719097 Ontario Limited
    Inventors: Raymond Rodenburgh, Brett Mitchell, Edward Bryant