Patents by Inventor Robert W Derrow

Robert W Derrow 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).

  • Sonar imaging system for mounting to watercraft
    Patent number: 7652952
    Abstract: A sonar imaging system for a watercraft is disclosed. The sonar imaging system comprises a transducer coupled to the watercraft and having at least one side scanning element and at least one bottom scanning element, an electronic control head unit coupled to the transducer and configured to display sonar images. The downward acoustic elements may be circular and the side scan acoustic elements may be rectangular. A software filter may be provided to remove noise generated by a spark plug or other operation of a motor for the watercraft.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: January 26, 2010
    Assignee: Johnson Outdoors Inc.
    Inventors: David A Betts, Robert W Derrow, David J Howells