Patents by Inventor Juuzoh Funayama

Juuzoh Funayama 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 disk drive with brittle disks
    Patent number: 4945432
    Abstract: A magnetic disk drive of the Winchester type has magnetic disks layered around the external peripheral surface of a spindle and separated mutually from one another by spacers. The substrate of the magnetic disks are made of non-metallic materials such as glass or ceramics but do not break easily by the motion of the spindle or the change in temperature because either the adhesive used to form a unistructural assembly of the magnetic disks and the spacers or elastic members inserted in annular indentations formed in the spacers serve as a buffer when the magnetic disks and the spacers are compressed together.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: July 31, 1990
    Assignee: Hoya Electronics Corporation
    Inventors: Takeo Matsudaira, Hiroshi Kouno, Shinji Eda, Juuzoh Funayama