Patents by Inventor Shiro Ohtani

Shiro Ohtani 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).

  • Packet routing apparatus and a method of communicating a packet
    Patent number: 7639604
    Abstract: When any communication port receives a packet from a network, it transmits the packet to a relay processing section. The relay processing section identifies a relay processing section of a transfer destination according to destination information included in the packet to transmit the packet to a packet switch section. When the relay processing section of the transfer destination is a working relay processing section, the packet switch section transfers the packet to the working relay processing section and a protection relay processing section.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: December 29, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Junnosuke Wakai, Hirofumi Masukawa, Taketoshi Kawashima, Kazumi Hakuta, Tomohiro Baba, Shiro Ohtani, Hisanori Kimoto
  • Packet routing apparatus and a method of communicating a packet
    Publication number: 20060126500
    Abstract: When any communication port receives a packet from a network, it transmits the packet to a relay processing section. The relay processing section identifies a relay processing section of a transfer destination according to destination information included in the packet to transmit the packet to a packet switch section. When the relay processing section of the transfer destination is a working relay processing section, the packet switch section transfers the packet to the working relay processing section and a protection relay processing section.
    Type: Application
    Filed: February 8, 2006
    Publication date: June 15, 2006
    Inventors: Junnosuke Wakai, Hirofumi Masukawa, Taketoshi Kawashima, Kazumi Hakuta, Tomohiro Baba, Shiro Ohtani, Hisanori Kimoto
  • Packet routing apparatus and a method of communicating a packet
    Patent number: 7027390
    Abstract: When any communication port receives a packet from a network, it transmits the packet to a relay processing section. The relay processing section identifies a relay processing section of a transfer destination according to destination information included in the packet to transmit the packet to a packet switch section. When the relay processing section of the transfer destination is a working relay processing section, the packet switch section transfers the packet to the working relay processing section and a protection relay processing section.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: April 11, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Junnosuke Wakai, Hirofumi Masukawa, Taketoshi Kawashima, Kazumi Hakuta, Tomohiro Baba, Shiro Ohtani, Hisanori Kimoto
  • Packet routing apparatus and a method of communicating a packet
    Publication number: 20020110136
    Abstract: When any communication port receives a packet from a network, it transmits the packet to a relay processing section. The relay processing section identifies a relay processing section of a transfer destination according to destination information included in the packet to transmit the packet to a packet switch section. When the relay processing section of the transfer destination is a working relay processing section, the packet switch section transfers the packet to the working relay processing section and a protection relay processing section.
    Type: Application
    Filed: February 4, 2002
    Publication date: August 15, 2002
    Inventors: Junnosuke Wakai, Hirofumi Masukawa, Taketoshi Kawashima, Kazumi Hakuta, Tomohiro Baba, Shiro Ohtani, Hisanori Kimoto