Patents by Inventor Jan Otto Ringdal

Jan Otto Ringdal 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).

  • Coupling device
    Publication number: 20040140880
    Abstract: The invention relates to an end piece for magnetic coupling of core parts to a closed path for magnetic flux, characterized in that it comprises at least an abutment surface for abutment against the core parts and a magnetic path part, where the path part is composed of several approximately parallel, wire-shaped bodies and the abutment surface is composed of the end surfaces of the wire-shaped bodies. The invention also relates to a method for manufacturing the end piece.
    Type: Application
    Filed: November 3, 2003
    Publication date: July 22, 2004
    Applicant: Magtech AS
    Inventors: Espen Haugs, Frank Strand, Jan Otto Ringdal
  • Reinforced front part for use in the manufacture of cabins/bodies for vehicles
    Patent number: 5954389
    Abstract: A reinforced front part of plastic, for use in the manufacture of cabins or bodies for vehicles in order to achieve rigidity, is molded or shaped as a box-shaped unit in one piece with an enclosure defined by at least five walls which serve as the front, bottom, bonnet, and side walls and with an open side to face the interior of the vehicle.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: September 21, 1999
    Assignee: A.S. Ringdal Patenter
    Inventors: Lars Ringdal, deceased, Jan Otto Ringdal