Patents by Inventor Jens J. Johansson

Jens J. Johansson 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).

  • Coding and decoding a modulated radio frequency signal
    Patent number: 5450454
    Abstract: The invention relates to a method for coding and decoding a radio frequency signal, modulated with a TV program or other message and transmitted from a transmitting center to a plurality of receiver locations, where the coding is effected by shifting, at short intervals, the frequency of each frequency component, contained in the radio frequency signal transmitted from the transmitting center, and decoding is effected by coordinately shifting, at authorized receiver locations, the frequency of each frequency component, contained in the radio frequency signal received at the locations.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: September 12, 1995
    Inventor: Jens J. Johansson