Patents by Inventor L. Neil Frazer

L. Neil Frazer 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).

  • Inverse tomography by matched field processing
    Patent number: 5355312
    Abstract: To determine the speed of propagation of a signal in a medium, wave amplitude is measured over time at one or more detectors disposed within the medium so as to detect and identify signals transmitted at one or more sources disposed within said region. Frequency domain matched field processing power is calculated by matching measured with perturbation normal mode model fields, and beta coefficients which determine sound speed profiles are calculated by beta backpropagation so as to maximize the matched field processing power.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: October 11, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Alexandra I. Tolstoy, Orest I. Diachok, L. Neil Frazer