Patents by Inventor Hiroshi Komatsuda

Hiroshi Komatsuda 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).

  • Barrier synchronizing mechanism for a parallel data processing control system
    Patent number: 5832261
    Abstract: In a parallel data processing control system for a parallel computer system having a plurality of computers and an adapter device connecting the computers to each other, a first unit, which is provided in the adapter device, transfers pieces of data processing progress state information to the computers. The pieces of the data processing progress state information respectively indicate data processing progress states of the computers. A second unit, which is provided in each of the computers, holds the pieces of the data processing progress state information. A third unit, which is provided in each of the computers, holds management information indicating a group of computers which share a data process. A fourth unit, which is provided in each of the computers, determines whether or not the computers in the group have completed the data process on the basis of the pieces of the data processing progress state information and the management information.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: November 3, 1998
    Assignee: Fujitsu Limited
    Inventors: Kenichi Ishizaka, Masayuki Katori, Masayuki Ikeda, Shigeru Nagasawa, Hiroshi Komatsuda
  • Networking apparatus which detects a stoppage of data transfer in a processing apparatus on a data origination side and then cancels the corresponding path in the switching unit
    Patent number: 5621395
    Abstract: A networking apparatus has its switching unit set a path for a data transfer from a processing apparatus on the data origination side to a processing apparatus on the data termination side. In case of a stop in the processing apparatus on the data origination side during the data transfer, the networking apparatus has its offline status detecting unit detect the stop by the presence or absence of an online status indication signal from the processing apparatus on the data origination side and generate an offline status indication signal. The networking apparatus has its controlling unit receive the offline status indication signal, and generate a simulated end-of-data signal, indicating a consummation of a data transfer, for transmission to a switching unit.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: April 15, 1997
    Assignee: Fujitsu Limited, Kawasaki
    Inventors: Akihito Kiyaji, Hiroshi Komatsuda, Masayuki Katori, Kenichi Ishizaka
  • Clock control apparatus
    Patent number: 5390224
    Abstract: A clock control apparatus having a basic period clock and a plurality of clocks with different phases from the basic period clock by t/N period, is used with an information processing unit.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: February 14, 1995
    Assignee: Fujitsu Limited
    Inventor: Hiroshi Komatsuda