Patents by Inventor Jan-Olov Sjodin

Jan-Olov Sjodin 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).

  • Circuitry for reduction of the magnetic field in the vicinity of multiphase power lines
    Patent number: 5777401
    Abstract: A circuitry (1) for reducing the magnetic field from multi-phase power lines for high voltage alternating current is disclosed. One phase (R) is split into two branches (R1, R2) forming a closed loop along a line portion (L). The self-reactance of the loop is adjusted for minimal magnetic field generation in the vicinity of the power line by a coupling to a compensation device, in the form of a capacitor (12), in a separate circuit (11), via a transformer (2).
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: July 7, 1998
    Assignee: Vattenfall AB (Publ.)
    Inventor: Jan-Olov Sjodin