Patents by Inventor Karl Ake Kristoffersson

Karl Ake Kristoffersson 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).

  • Methods and system for switching time-division-multiplexed digital signals of different rates
    Patent number: 5784369
    Abstract: A digital telecommunications switching system includes a main normal rate switch having multiple, bi-directional ports for selectively switching timeslot associated with normal rate channels multiplexed on incoming and outgoing digital links. Each timeslot in the frame includes a predetermined number of bits. The normal rate switch switches timeslots received from any one of the switch ports to any one of the other switch ports at the normal rate. An "add-on" subrate switch is modularly connected to the normal rate switch and selectively switches one or more bits corresponding to one or more subrate channels within a timeslot at a data transmission rate which is less than the normal rate.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: July 21, 1998
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Stefano Romiti, Karl Ake Kristoffersson