Patents by Inventor Akihiro Ohhashi

Akihiro Ohhashi 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).

  • Apparatus and method for controlling a system process
    Patent number: 5581759
    Abstract: A process controlling method and apparatus which uses a flowchart language program and ladder programs with an intermediate register accessible using the same name by both the flowchart language program and the ladder programs. Each ladder program defines the operation of a machine, including an interlock condition of the machine operation. The flowchart language program defines an automatic operation flow which sequentially activates the ladder programs using the data in the intermediate register. This arrangement allows the flowchart language program to be separated from the ladder programs improving productivity, serviceability and security of the programs.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: December 3, 1996
    Assignees: Hitachi, Ltd., Hitachi Information and Control Systems, Inc.
    Inventors: Akihiro Ohhashi, Tadashi Okamoto, Makoto Tachikawa, Takeshi Katoh, Noboru Azusawa, Junichi Hamano, Hitoshi Saitoh
  • Apparatus and method for controlling a system process
    Patent number: 5355482
    Abstract: A process controlling method uses a flowchart language program and ladder programs with an intermediate register to be accessible with the same name by both the flowchart language program and the ladder programs. Each ladder program defines the operation of a machine, including an interlock condition or the like of the machine operation. The flowchart language program defines an automatic operation flow which sequentially activates the ladder programs using the data in the intermediate register. This arrangement allows the flowchart language program to be separated from the ladder programs, thereby improving productivity, serviceability and security of the programs.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: October 11, 1994
    Assignees: Hitachi, Ltd., Hitachi Information & Control Systems, Inc.
    Inventors: Akihiro Ohhashi, Tadashi Okamoto, Makoto Tachikawa, Takeshi Katoh, Noboru Azusawa, Junichi Hamano, Hitoshi Saitoh