Patents Assigned to Manaco International
  • Ocean floor dredging
    Patent number: 4937956
    Abstract: A system of ocean floor dredging comprises a first vessel, two rotatable rollers on the vessel, a third roller lying on the ocean floor, and an endless net extending around the three rollers.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: July 3, 1990
    Assignee: Manaco International
    Inventor: Miloslav Malecha