Patents by Inventor Yu MAETA

Yu MAETA 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).

  • Composite particle of soft-magnetic metallic material, method for producing composite particle, powder core, magnetic element, and portable electronic device
    Patent number: 9767956
    Abstract: A composite particle includes: a particle composed of a soft magnetic metallic material, and a coating layer composed of a soft magnetic metallic material having a different composition from that of the particle and fusion-bonded to the particle so as to cover the particle, wherein when the Vickers hardness of the particle is represented by HV1 and the Vickers hardness of the coating layer is represented by HV2, HV1 and HV2 satisfy the following relationship: 100?HV1?HV2, and when half of the projected area circle equivalent diameter of the particle is represented by r and the average thickness of the coating layer is represented by t, r and t satisfy the following relationship: 0.05?t/r?1.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: September 19, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Isamu Otsuka, Yu Maeta, Toshikuni Sato
  • COMPOSITE PARTICLE, METHOD FOR PRODUCING COMPOSITE PARTICLE, POWDER CORE, MAGNETIC ELEMENT, AND PORTABLE ELECTRONIC DEVICE
    Publication number: 20140138570
    Abstract: A composite particle includes: a particle composed of a soft magnetic metallic material, and a coating layer composed of a soft magnetic metallic material having a different composition from that of the particle and fusion-bonded to the particle so as to cover the particle, wherein when the Vickers hardness of the particle is represented by HV1 and the Vickers hardness of the coating layer is represented by HV2, HV1 and HV2 satisfy the following relationship: 100?HV1?HV2, and when half of the projected area circle equivalent diameter of the particle is represented by r and the average thickness of the coating layer is represented by t, r and t satisfy the following relationship: 0.05?t/r?1.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Inventors: Isamu OTSUKA, Yu MAETA, Toshikuni SATO
  • COMPOSITE PARTICLE, POWDER CORE, MAGNETIC ELEMENT, AND PORTABLE ELECTRONIC DEVICE
    Publication number: 20140138569
    Abstract: A composite particle includes: a first particle composed of a soft magnetic metallic material; and second particles composed of a soft magnetic metallic material having a different composition from that of the first particle and adhered to the first particle so as to cover the first particle, wherein when the Vickers hardness of the first particle is represented by HV1 and the Vickers hardness of the second particle is represented by HV2, HV1 and HV2 satisfy the following relationships: 250?HV1?1200, 100?HV2<250, and 100?HV1?HV2, and when the projected area circle equivalent diameter of the first particle is represented by d1 and the projected area circle equivalent diameter of the second particle is represented by d2, d1 and d2 satisfy the following relationships: 30 ?m?d1?100 ?m and 2 ?m?d2?20 ?m.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Inventors: Isamu OTSUKA, Yu MAETA, Toshikuni SATO
  • SOFT MAGNETIC POWDER, DUST CORE, AND MAGNETIC DEVICE
    Publication number: 20130255836
    Abstract: A soft magnetic powder containing an amorphous alloy material having an alloy composition represented by Fe100-a-b-c-dMnaSibBcCd wherein a, b, c and d each represent a proportion in terms of percent by atom, and satisfy 0.1?a?10, 3?b?15, 3?c?15, and 0.1?d?3.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 3, 2013
    Applicant: Seiko Epson Corporation
    Inventors: Isamu OTSUKA, Yu MAETA, Toshikuni SATO