Patents by Inventor Jan Steyn

Jan Steyn 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).

  • Method and apparatus for dredging
    Patent number: 4177585
    Abstract: In order to accurately control the cutter head of a cutter head suction dredger anchored by means of ropes, the tension in at least one of the two longitudinal ropes is measured and the winch of at least one of the two longitudinal ropes is actuated in dependence upon the tension measured in the one longitudinal rope.
    Type: Grant
    Filed: February 8, 1978
    Date of Patent: December 11, 1979
    Assignees: Ballast-Nedam Groep N.V., Amsterdamse Ballast Bagger en Grond (Amsterdam Ballast Dredging) B.V., Scheepswerf en Machinefabriek "De Liesbosch" B.V.
    Inventors: Jan de Koning, Jan Steyn