Patents by Inventor Richard Lovell Holford

Richard Lovell Holford 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).

  • 3-D acoustic infinite element based on an ellipsoidal multipole expansion
    Patent number: 5963459
    Abstract: In an improvement over conventional finite element techniques, an ellipsoidal infinite element is used for the modeling of acoustic fields in exterior, fluid-filled domains surrounding a structure. This ellipsoidal infinite element is based on a multipole expansion that describes, to arbitrary accuracy, any scattered and/or radiated field exterior to an ellipsoid. Significantly, the respective eccentricities of the three elliptical cross sections of the ellipsoid can take values that are arbitrary and mutually independent. The ellipsoidal infinite element is readily incorporated in any structural or acoustic finite element code.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: October 5, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: David Storer Burnett, Richard Lovell Holford