Patents by Inventor George B. Pillsbury

George B. Pillsbury 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).

  • Patent number: 5615254
    Abstract: Methods and systems of traffic routing in a circuit switched communication network having a plurality of switches and a plurality of trunk groups connecting the switches are disclosed. The methods include a step of determining a set of alternate routing paths for each of a plurality of ordered pairs of the switches, wherein the number of alternate routing paths through each of the trunk groups is constrained to be less than a corresponding first predetermined threshold. In one embodiment, the alternate routing paths are determined by computing a solution to a predetermined integer programming problem. In another embodiment, a heuristic technique is used to determine the alternate routing paths.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: March 25, 1997
    Assignee: U S West Technologies, Inc.
    Inventors: Yuping Qiu, Jennifer Ryan, Xiaorong Sun, George B. Pillsbury, Alex Stevens, Rudy Zubiate