Patents by Inventor Stephen P. Berardinelli

Stephen P. Berardinelli 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).

  • Acoustical method and system for measuring barrier membrane thickness and the correspondent area distribution using maximum transmission or maximum reflection coefficients
    Patent number: 6089094
    Abstract: The invention relates a method and a system for membrane thickness and the correspondent area distribution measurement based on the dependency of the acoustic intensity transmission coefficient upon the thickness of the insertion membrane and the proportion of the power of the transmitted acoustic plane waves to the area of the insertion membrane. The principle of the invention is that, when the acoustic wave travels in the acoustic medium and encounters an insertion membrane with different acoustic impedance, the intensity transmission coefficient T is related to the thickness d of the insertion membrane and the frequency f of the transmitting acoustic wave. As f sweeps, maximum T occurs at a set of frequency points corresponding to a certain thickness of the insertion membrane. By confining the sweeping frequency within a certain range, T.sub.max can only occur at one frequency point corresponding to a certain thickness of the insertion membrane.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: July 18, 2000
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Shengke Zeng, Stephen P. Berardinelli