Patents by Inventor Leonard D. Seader

Leonard D. Seader 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).

  • Ultrasound blood flow/tissue imaging system
    Patent number: 5477858
    Abstract: An ultrasound imaging system is provided which produces gray scale images of the anatomy simultaneous with Doppler signal processing so as to provide a single real-time image that shows not only the vascular anatomy and surrounding tissue but also flow events in the vascular compartment. A phased linear array having near-continuous focus over the scanning field provides high resolution and very small Doppler sample volumes. The system tests incoming signals from throughout the scanning field for amplitude, phase and frequency so as to determine B-mode data, motion presence and direction, and echo source velocity.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: December 26, 1995
    Assignee: Siemens Medical Systems, Inc.
    Inventors: Paul R. Norris, John Folline, Richard H. Chesarek, Michael J. Veraya, James R. Chekerylla, Richard A. Revell, Thomas R. Clary, Richard K. Johnson, Lee D. Dunbar, David R. Axness, John C. Lazenby, Donald R. Gardner, William E. Crone, W. Gerrit Barrere, Charles C. Myrick, Bruce M. Pirie, Leonard D. Seader, Louis A. Heaton, David M. Polakowski, Brian J. Sargent
  • Wide dynamic range ultrasound echo receiver
    Patent number: 4454884
    Abstract: The wide dynamic range ultrasound receiver utilizes a multi-stage logarithmic amplifier in order to logarithmically amplify a returned echo signal. The output of the returned echo signal from the logarithmic amplifier is simply added to a saw-tooth wave Time Gain Control (TGC) signal. Thus, the wide dynamic range of the returned echo signals is simply converted into a video display.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: June 19, 1984
    Assignee: Advanced Technology Laboratories, Inc.
    Inventor: Leonard D. Seader
  • Unit transistor amplifier with matched input and output impedances
    Patent number: RE29844
    Abstract: An amplifier having a combination of local series and shunt feedback to provide matched input and output impedances permitting cascading of a number of amplifiers or amplifiers and other devices without signal degradation. .Iadd.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: November 21, 1978
    Assignee: Avantek, Inc.
    Inventors: Leonard D. Seader, James E. Sterrett