Patents by Inventor Gerhard H. De Witz

Gerhard H. De Witz 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 subsurface cleaning
    Patent number: 4444146
    Abstract: Apparatus for cleaning marine fouling material from a submerged surface, including a submersible unit movable along a submerged surface to be cleaned, and ultrasonic means carried by the unit and energizable to create a zone of cavitation at the surface, so that movement of the unit moves the zone along the surface to clean fouling material therefrom.
    Type: Grant
    Filed: January 13, 1982
    Date of Patent: April 24, 1984
    Assignee: Honeywell Inc.
    Inventors: Gerhard H. De Witz, Bernard W. Yaeger