Patents by Inventor Kazuyoshi ISHIZUKA

Kazuyoshi ISHIZUKA 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).

  • Ceramic core, wire-wound electronic component, and method for producing ceramic core
    Patent number: 10867739
    Abstract: A ceramic core, which is made of a ferrite material including Ni and Zn, includes an axial core extending in a length direction and a pair of flange portions disposed at both ends of the axial core in the length direction. The dimension L of the ceramic core in the length direction satisfies 0 mm<L?1.1 mm. The surface roughness of a ridge portion of the axial core is less than or equal to 2.5 ?m.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: December 15, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takeshi Uchida, Kazuyoshi Ishizuka
  • Ceramic core, wire-wound electronic component, and manufacturing method for ceramic core
    Patent number: 10636558
    Abstract: A ceramic core includes an axial core part extended in the longitudinal direction, and a pair of flanges located at both ends in the longitudinal direction of the axial core part and projecting around the periphery of the axial core part in the height and width directions. The ceramic core has a length dimension L in the longitudinal direction of about 0 mm<L?1.1 mm. A ratio t/T of the thickness dimension t in the height direction of the axial core part to the height dimension T in the height dimension of the flanges, is about 0<t/T?0.6. A ratio w/W of the width dimension w in the width direction of the axial core part to the width dimension W in the width direction of the flanges, is about 0<w/W?0.6.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: April 28, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takeshi Uchida, Akira Kurakake, Kazuyoshi Ishizuka, Kazuhiro Yoshii
  • CERAMIC CORE, WIRE-WOUND ELECTRONIC COMPONENT, AND METHOD FOR PRODUCING CERAMIC CORE
    Publication number: 20170330672
    Abstract: A ceramic core, which is made of a ferrite material including Ni and Zn, includes an axial core extending in a length direction and a pair of flange portions disposed at both ends of the axial core in the length direction. The dimension L of the ceramic core in the length direction satisfies 0 mm<L?1.1 mm. The surface roughness of a ridge portion of the axial core is less than or equal to 2.5 ?m.
    Type: Application
    Filed: May 1, 2017
    Publication date: November 16, 2017
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Takeshi UCHIDA, Kazuyoshi ISHIZUKA
  • CERAMIC CORE, WIRE-WOUND ELECTRONIC COMPONENT, AND MANUFACTURING METHOD FOR CERAMIC CORE
    Publication number: 20170330676
    Abstract: A ceramic core includes an axial core part extended in the longitudinal direction, and a pair of flanges located at both ends in the longitudinal direction of the axial core part and projecting around the periphery of the axial core part in the height and width directions. The ceramic core has a length dimension L in the longitudinal direction of about 0 mm<L?1.1 mm. A ratio t/T of the thickness dimension t in the height direction of the axial core part to the height dimension T in the height dimension of the flanges, is about 0<t/T?0.6. A ratio w/W of the width dimension w in the width direction of the axial core part to the width dimension W in the width direction of the flanges, is about 0<w/W?0.6.
    Type: Application
    Filed: May 1, 2017
    Publication date: November 16, 2017
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Takeshi UCHIDA, Akira KURAKAKE, Kazuyoshi ISHIZUKA, Kazuhiro YOSHII