Patents by Inventor Keiji Saijo

Keiji Saijo 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).

  • Virtual machine system having an extended storage
    Patent number: 5341484
    Abstract: A virtual machine system in which a plurality of operating systems (OS's) can run on one computer including a physical main storage (physical MS), and at least one physical extended storage (physical ES), each operating system (OS) of the OS's having a virtual MS on the physical MS and at least one virtual ES on the at least one physical ES.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: August 23, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Shunji Tanaka, Akira Yamaoka, Hidenori Umeno, Masatoshi Haraguchi, Kiyoshi Ogawa, Keiji Saijo, Katsumi Takeda