Patents by Inventor Randy L. Duvall

Randy L. Duvall 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).

  • Ultrasonic testing device having an adjustable water column
    Patent number: 9121817
    Abstract: An ultrasonic testing device having a variable fluid column height is disclosed. An operator is able to adjust the fluid column height in real time during an inspection to to produce optimum ultrasonic focus and separate extraneous, unwanted UT signals from those stemming from the area of interest.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: September 1, 2015
    Assignee: Sandia Corporation
    Inventors: Dennis P. Roach, Stephen O. Neidigk, Kirk A. Rackow, Randy L. Duvall