Patents by Inventor Keizo Yabuta

Keizo Yabuta 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).

  • Server system having I/O interface unit
    Patent number: 7873750
    Abstract: A disclosed server system has a processor blade in which a processor is mounted and an interface unit that is connected to an external device, and a serial interface connects between these units. Multiple serial interfaces are bundled to enable expansion of a band. The processor blade and the interface unit connect fellow connectors back to back.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: January 18, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Keizo Yabuta, Hidekazu Itsuki, Kazutoshi Abe, Masaaki Higuchi
  • Server system
    Publication number: 20050015531
    Abstract: A disclosed server system has a processor blade in which a processor is mounted and an interface unit that is connected to an external device, and a serial interface connects between these units. Multiple serial interfaces are bundled to enable expansion of a band. The processor blade and the interface unit connect fellow connectors back to back.
    Type: Application
    Filed: May 26, 2004
    Publication date: January 20, 2005
    Inventors: Keizo Yabuta, Hidekazu Itsuki, Kazutoshi Abe, Masaaki Higuchi
  • Semiconductor integrated device
    Patent number: 5305379
    Abstract: A sending data buffer for holding sending data temporarily and transmitting the data to an echo canceler section is installed between a sending section and an echo canceler section of an echo canceler integrated circuit included in a subscriber line circuit of an integrated service digital network. The sending data buffer is operated in a shift register mode during a sending training mode, and operated in FIFO (first in-first out) mode during a sending/receiving training mode. Also, an adjustment function of the delay amount corresponding to the use setting is added.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: April 19, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Yusuke Takeuchi, Masaru Kokubo, Keizo Yabuta, Atuko Kenmoku, Kazuo Okado