Patents by Inventor Sizuo Ishikawa

Sizuo Ishikawa 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).

  • Ultrasonodiagnostic tomography apparatus
    Patent number: 4974558
    Abstract: In an ultrasonodiagnostic tomography apparatus for transmitting focused sound wave from a plurality of transducers forming an array to a predetermined focus point and for carrying out beam formation for receiving sound from said focus point with dynamic focusing, wherein the width of transmission beam at said focus point is controlled by means of said transducers so that the width of transmission beam at said focus point may be larger than the width of receiving beam from said focus point.
    Type: Grant
    Filed: August 27, 1985
    Date of Patent: December 4, 1990
    Assignee: Hitachi Medical Corporation
    Inventors: Kageyoshi Katakura, Toshio Ogawa, Shinichiro Umemura, Sizuo Ishikawa