Patents by Inventor Toru Sugai

Toru Sugai 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).

  • Magnetic head including single crystal and polycrystalline ferrites with interfacial oxide layer
    Patent number: 4787004
    Abstract: A composite magnetic head in which a single crystal ferrite is used at the slide contact portion with the magnetic recording medium and a polycrystalline ferrite is used at the portion constituting the back magnetic circuit, is disclosed. An oxide magnetic thin film is formed at the junction interface between the single crystal ferrite and the polycrystalline ferrite for providing a magnetic head free from diffusion at the junction surface and evidencing only a low slide noise level.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: November 22, 1988
    Assignee: Sony Corporation
    Inventors: Hiraku Akiho, Hideaki Karamon, Sadayuki Nishiuchi, Toru Sugai