Patents by Inventor Roger Blake Nessen

Roger Blake Nessen 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).

  • Hydrophone
    Patent number: 9772220
    Abstract: A hydrophone has a pair of end caps each disposed on a different open end of an air-backed cylinder of a piezoelectric ceramic material. An electrode or lead extends through one of the end caps and into the cylinder, and has a shape and a lateral width that extends across an interior of the cylinder and abuts an inner surface of the cylinder at multiple points.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: September 26, 2017
    Assignee: Harris Corporation
    Inventors: Gordon Douglas Cook, Roger Blake Nessen