Patents Assigned to Ronald Nilson
  • Submersible observation vessel
    Patent number: 4928614
    Abstract: A submersible observation vessel having a transparent acrylic hull. The hull comprises a plurality of transparent acrylic cylinders, a plurality of seals to prevent leakage between the cylinders of the hull, a front hatch hinged on the first seal, and a bulk head having an aft hatch welded to the last seal. An integral cradle supports the vessel when on dry dock and provides a medium for lifting the vessel into and out of the water.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: May 29, 1990
    Assignees: Ronald Nilson, Sea View Enterprises
    Inventor: Willis R. Forman