Patents by Inventor Won H. Rhee

Won H. Rhee 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).

  • Mn-Zn-based single crystal ferrite composition
    Patent number: 5368764
    Abstract: An Mn-Zn-based single crystal ferrite composition containing an additive material essentially consisting of 0.2 to 2 mole % SnO.sub.2, 0.1 to 1 mole % CoO, 0.2 to 1 mole % CaCO.sub.3 and 0.02 to 1 weight % V.sub.2 O.sub.5 added to a host material essentially consisting of 51 to 54 mole % Fe.sub.2 O.sub.3, 27 to 33 mole % MnO and 16 to 20 mole % ZnO. A magnetic head manufactured from the single crystal ferrite generates an enhanced reproduction output and a reduced rubbing noise, thereby achieving a high picture quality and a high resolution of images.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: November 29, 1994
    Assignee: Goldstar Co., Ltd.
    Inventors: Jung S. Yoon, Won H. Rhee, Jae H. Koh, Woo S. Jang