Patents by Inventor Alan Y. Liu

Alan Y. Liu 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).

  • Method for measuring the myocardial electrical impedance spectrum
    Patent number: 5454377
    Abstract: A method for measuring the complex impedance spectrum of a portion of the myocardium by placing two electrodes on a portion of the myocardium and applying a current pulse to the electrodes to generate a voltage response between the electrodes. Both the current pulse and voltage response are sampled and digitized and then a Fast fourier transform is taken of both the current pulse and the voltage response to obtain a complex current pulse spectrum and a complex voltage response spectrum. Next, the complex voltage response spectrum is divided by the complex current pulse spectrum to obtain the complex impedance spectrum.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: October 3, 1995
    Assignee: The Ohio State University
    Inventors: Roger R. Dzwonczyk, Alan Y. Liu, Alan W. Hartzler