Patents by Inventor Michitaka TAKASAKI

Michitaka TAKASAKI 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 storage apparatus
    Patent number: 11587580
    Abstract: A magnetic storage apparatus includes a disk-shaped magnetic recording medium, a motor which drives and rotates the magnetic recording medium, a magnetic head, including a first magnetic head element which reads information from the magnetic recording medium, and a second magnetic head element which writes information to the magnetic recording medium, and a bias circuit which supplies a predetermined bias voltage to the first magnetic head element. The magnetic recording medium has a laminated structure including a magnetic layer disposed above a substrate, and a carbon protective layer disposed above the magnetic layer. The bias circuit supplies to the first magnetic head element a voltage which is in a range of ?0.2 V to ?1.0 V with respect to a potential of the magnetic recording medium.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: February 21, 2023
    Assignee: SHOWA DENKO K.K.
    Inventors: Yoshihito Sueoka, Koji Itokazu, Noriya Seiki, Michitaka Takasaki
  • MAGNETIC STORAGE APPARATUS
    Publication number: 20220343942
    Abstract: A magnetic storage apparatus includes a disk-shaped magnetic recording medium, a motor which drives and rotates the magnetic recording medium, a magnetic head, including a first magnetic head element which reads information from the magnetic recording medium, and a second magnetic head element which writes information to the magnetic recording medium, and a bias circuit which supplies a predetermined bias voltage to the first magnetic head element. The magnetic recording medium has a laminated structure including a magnetic layer disposed above a substrate, and a carbon protective layer disposed above the magnetic layer. The bias circuit supplies to the first magnetic head element a voltage which is in a range of ?0.2 V to ?1.0 V with respect to a potential of the magnetic recording medium.
    Type: Application
    Filed: April 8, 2022
    Publication date: October 27, 2022
    Inventors: Yoshihito SUEOKA, Koji ITOKAZU, Noriya SEIKI, Michitaka TAKASAKI