Patents by Inventor Keith J. Mason

Keith J. Mason 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).

  • Combined stabilizer and reamer for drilling well bores
    Patent number: 4231437
    Abstract: An upper stabilizer and a lower reamer are mounted on an integral or one-piece body adapter to be connected in a tubular drilling string for drilling well bores.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: November 4, 1980
    Assignee: Christensen, Inc.
    Inventors: Gerald S. Swersky, Keith J. Mason