Patents by Inventor Daryl C. Lu

Daryl C. Lu 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: 5623541
    Abstract: An Operations Support System, comprised of a computer and workstation, stores digit analysis specifications for telecommunications call processing. A graphical user interface displays digit analysis specifications visually as subtrees made up of nodes representing the digits of the dialed number. Two subtrees can be displayed contemporaneously for evaluation and manipulation independently and from one to another. Operations performed on the nodes also operate on the embedded digit analysis specifications permitting manipulation of the specifications without the need to view or deal with the specifications themselves directly. Related information such as Routing Table Indexes and local exchange numbers called NXX numbers are displayed contemporaneous with display of a subtree of interest and are manipulated with regard to that subtree.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: April 22, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Valerie Y. Boyle, Daryl C. Lu, George L. Sicherman, Robert A. Swanson
  • Patent number: 5032991
    Abstract: The present disclosure is directed to a technique for assigning each of a plurality of test points (34) on a first surface of a translator board (24) to an appropriate one of a set of grid points (36) on an opposed surface of the board. Such an assignment is accomplished by first mapping the grid points (36) and a successive one of the test points (34) into an array (49a) of uniformly spaced cells (49b). An initial group of cells (49b), surrounding the mapped test point (34), is then searched to locate the four grid points (36) closest to the test point. Among the four closest grid points (36), the one which satisfies a particular constraint is designated. A check is then made to determine whether the designated grid point (36) is appropriate for the test point (34). If so, the grid point (36) is assigned to the test point (34) and the grid point is removed from the array before mapping the next test point.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: July 16, 1991
    Assignee: AT&T Ball Laboratories
    Inventors: Scott Davidson, Charles D. Hechtman, James L. Lewandowski, Daryl C. Lu