Patents by Inventor Bengt Hellstrom

Bengt Hellstrom 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 of measuring the dispersion of a transmitting optical fibre
    Patent number: 4637072
    Abstract: A method of measuring mode dispersion in a transmitting optical fibre for transferring light signals representing digital information coded according to a binary line code. The clock signal amplitude is first measured in the system receiver with the pertinent transmission fibre connected and thereafter with the system loop-connected. The dispersion can be calculated from both measured amplitude values.
    Type: Grant
    Filed: November 8, 1984
    Date of Patent: January 13, 1987
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: Bengt Hellstrom