Patents by Inventor Akiyo Yuguchi

Akiyo Yuguchi 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 impedance element
    Publication number: 20030006763
    Abstract: A magnetic impedance element including a substrate made of a non-magnetic material, a thin-film magnetic core formed on said substrate, and first and second electrodes disposed on both ends of said thin-film magnetic core in a longitudinal direction thereof, characterized in that said thin-film magnetic core is formed by laminating a plurality of magnetic films through non-magnetic thin-films.
    Type: Application
    Filed: August 30, 2002
    Publication date: January 9, 2003
    Applicant: Mineaba Co., Ltd.
    Inventors: Akio Takayama, Tamio Umehara, Akiyo Yuguchi, Hideki Kato, Akira Goto
  • Magnetic impedance element having at least two thin film-magnetic cores
    Patent number: 6472868
    Abstract: A magnetic impedance element including a substrate made of a non-magnetic material, a thin-film magnetic core formed on said substrate, and first and second electrodes disposed on both ends of said thin-film magnetic core in a longitudinal direction thereof, characterized in that said thin-film magnetic core is formed by laminating a plurality of magnetic films through non-magnetic thin-films.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: October 29, 2002
    Assignee: Minebea Co., Ltd.
    Inventors: Akio Takayama, Tamio Umehara, Akiyo Yuguchi, Hideki Kato, Akira Goto
  • Magnetic sensor
    Patent number: 6229307
    Abstract: A magnetic sensor includes: an oscillating circuit for allowing an a.c. magnetic field into a magnetic impedance element made of a ferromagnetic substance, having first and second electrodes on both ends thereof in a longitudinal direction thereof and having a structure in which a bias coil and a negative feedback coil are wound around the ferromagnetic substance through an insulator; a detecting circuit for detecting an a.c. voltage of the magnetic impedance element due to a change in the impedance of the magnetic impedance element which is caused by an applied external magnetic field; a peak holding circuit for holding the peak value of the output voltage of the detecting circuit; and an amplifying circuit for differentially amplifying the output of the peak holding circuit.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: May 8, 2001
    Assignee: Minebea Co., Ltd.
    Inventors: Tamio Umehara, Akio Takayama, Hideki Kato, Akiyo Yuguchi