Patents by Inventor Norbert von der Stein

Norbert von der Stein 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).

  • Rudder propeller with nozzle
    Patent number: 5246393
    Abstract: The nozzle ring associated with the propeller and rotatable together with it around the vertical axis is designed as a partially open annulus and arranged such that the inner circle of the nozzle--and consequently practically the wing tip circle as well--approximately touches the respective local separating surface between the flow and the floating body or boat.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: September 21, 1993
    Inventor: Norbert von der Stein