Patents by Inventor Kensaburou Iijima

Kensaburou Iijima 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).

  • Disk for magnetic recording
    Patent number: 4990389
    Abstract: A disk for magnetic recording, including a thin Fe-Cr-Co magnetic wafer for signal recording and a rigid substrate reduces the development of large warps and enlarges the output signals, thereby significantly reducing read-out errors.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: February 5, 1991
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventors: Kensaburou Iijima, Kazuyuki Asano