Patents by Inventor Shunji Tanaka

Shunji Tanaka 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).

  • Patent number: 5369750
    Abstract: A method and an apparatus for configuring multiple absolute address spaces are disclosed which simultaneously operate a plurality of virtual machines (VMs) respectively having operating systems on a single real computer by allocating a plurality of logical address spaces to an absolute address space. A different absolute address space is allocated to each of the VMs, whereby the respective VMs can access a main storage with a designated address without adding a constant to the designated address.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: November 29, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Taro Inoue, Hidenori Umeno, Shunji Tanaka, Tsuyoshi Watanabe
  • 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
  • Patent number: 5095427
    Abstract: A method and a system in a virtual machine system controlling a simultaneous run of one or more operating systems (OS's) by use of a virtual machine control program on a real machine including a storage area for each virtual processor constituting the virtual machine for saving a status of each virtual processor, for storing an active flag indicating whether or not the virtual processor is in the active state, and for storing a running priority specified for each virtual processor by the control program wherein when an OS being running issues an instruction to set the processor to the wait state, the instruction is directly executed, a state of the virtual processor being running is stored in the status save area, a processor is selected from processors for which the nonactive state is set, a virtual processor is selected according to the running priority from a group of virtual processors not in the wait state nor in the active state, and a content of the status save area of the virtual processor is set to t
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: March 10, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Shunji Tanaka, Hidenori Umeno
  • Patent number: 4887202
    Abstract: An I/O control system in a virtual machine system has at least one virtual machine (VM) running under control of a virtual machine control program (VMCP) and has a direct I/O execution mode in which an I/O interruption to the I/O device dedicated by the running VM is directly executed without intervention of the VMCP and an indirect I/O execution mode in which the I/O interruption is simulated. The I/O control system comprises identification portion for identifying the I/O device requesting the switching to the direct I/O execution mode, judge portion for judging a mode switching condition and mode selection portion for selecting one of the two modes.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: December 12, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Shunji Tanaka, Hidenori Umeno
  • Patent number: 4817597
    Abstract: A self-contained closed-circuit oxygen-generating breathing appratus is provided with a partition wall disposed in such a manner as to oppose at least the lower portion of the inner surface of a breathing bag. The partition wall partitions the central portion and peripheral portion of the interior of the breathing bag along the inner surface of the breathing bag, and the space or gap between the partition wall and the inner surface of the breathing bag acts as a passage for oxygen-enriched gas discharged from the outlet of a canister of an oxygen-generating agent into the interior of the breathing bag. The oxygen-enriched gas can flow through the passage while kept in good contact with the inner surface of the breathing bag, and thus can be cooled to a temperature suitable for inhalation by the user.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: April 4, 1989
    Assignee: Japan Pionics, Ltd.
    Inventor: Shunji Tanaka
  • Patent number: 4809330
    Abstract: In a multipulse pitch speech excitation generator, pulses which may everlap the next frame are eliminated by a subtraction process (CC-HH), and pulses from the next frame which may overlap the present frame are eliminated by selection.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: February 28, 1989
    Assignee: NEC Corporation
    Inventors: Shunji Tanaka, Naoki Matsumura
  • Patent number: 4005277
    Abstract: An echo controller comprises a parallel circuit of an echo suppressor and a self-adaptive echo canceller near an echo path of a long-distance telephone network. The echo controller further comprises a mode switch responsive to levels of a received signal, an unprocessed signal, and an output signal of the echo canceller and operable during absence of double talk for suspending operation of the echo canceller and putting instead the echo suppressor into operation only when characteristics of the echo path and operation of the echo canceller are objectionable.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: January 25, 1977
    Assignee: Nippon Electric Company, Ltd.
    Inventors: Takashi Araseki, Kazuo Ochiai, Takashi Ogihara, Shunji Tanaka
  • Patent number: D339553
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: September 21, 1993
    Assignee: Mazda Motor Corporation
    Inventor: Shunji Tanaka