Patents by Inventor Keiji Furui

Keiji Furui 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).

  • MRI multi-frequency DSB and SSB RF synthesizer
    Patent number: 5436600
    Abstract: A local frequency generator employing a single crystal oscillator, latches and direct digital synthesizer circuits digitally produces all signals needed in the transmitter channel of a MRI system to generate MRI transmitter RF pulses. The local frequency generator is operable in both the single side band and double side band modes and has the capability of switching between the modes. The generator is constructed with a phase resetting capability for providing the plural output frequencies needed for making plural MRI slices.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: July 25, 1995
    Assignee: The Regents of the University of California
    Inventors: John Van Heteren, Mitsuaki Arakawa, Lawrence E. Crooks, John C. Hoenninger, III, Thomas McDermott, Keiji Furui