Patents by Inventor Kozi Otsuka

Kozi Otsuka 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).

  • Thin film magnetic head with reduced internal stresses
    Patent number: 5225951
    Abstract: A thin film magnetic head includes yokes for leading magnetic flux of signals generated from a magnetic recording medium up to a magnetic resistance effect element. The yokes are made of sputtered films having internal compressive stress therein. The internal stress in the yokes which are deleterious to the magnetic properties of the magnetic resistance effect element can be negated or reduced by including a film of material on the yokes for compensating for the internal stresses.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: July 6, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Kira, Kozi Otsuka, Kazuyoshi Imae, Mitsuhiko Yoshikawa, Kengo Shiiba
  • Yoke thin film magnetic head constructed to avoid Barkhausen noises
    Patent number: 5155644
    Abstract: The yoke thin film magnetic head according to the present invention includes yokes for leading the magnetic flux of signals generated from the magnetic recording medium up to the magnetic resistance effect element, which yokes are made of sputtered films having compressive stress therein. Therefore, the internal stress in the yokes which cause bad influences upon magnetic properties of the magnetic resistance effect element can be negated or reduced, with less Barkhausen noises produced.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: October 13, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Kira, Kozi Otsuka, Kazuyoshi Imae, Mitsuhiko Yoshikawa, Kengo Shiiba
  • Thin film magnetic head with an application type silicon dioxide film
    Patent number: 4789910
    Abstract: A thin film magnetic head which comprises an end portion of a first yoke and an end portion of a second yoke confronting each other through a magnetic gap, and receiving from a recording surface or a recording medium, a magnetic signal, and a magnetic reluctance effect element disposed for magnetic coupling in the course of a magnetic path constituted by the first and second yokes. The thin film magnetic head is characterized in that the first yoke or magnetic reluctance effect element is formed on an application type SiO.sub.2 film which improves the surface roughness of the ground layer.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: December 6, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kozi Otsuka, Tohru Kira, Kazuyoshi Imae, Mitsuhiko Yoshikawa
  • Process for hydrocarbon reforming and apparatus therefor
    Patent number: 4371452
    Abstract: Disclosed is a process for reforming hydrocarbon which comprises heating up to 800.degree. C. or higher a gaseous mixture of sulfur containing hydrocarbon with an oxidizing agent for reforming such as steam or a mixture of steam and carbon dioxide, while passing the gaseous mixture through an alkaline solid packing bed containing alkali metal and/or alkaline earth metal followed by bringing into contact thereof with a nickel containing catalyst at a temperature of 800.degree. C. or higher to produce a mixed gas containing hydrogen and carbon monoxide. An apparatus for the practice of the process is also disclosed.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: February 1, 1983
    Assignee: Toyo Engineering Corporation
    Inventors: Kozo Ohsaki, Kazuo Hirokawa, Goro Fukuda, Kozi Otsuka, Tadayoshi Tomita