Patents by Inventor Akinao Tanikawa

Akinao Tanikawa 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).

  • Power supply control apparatus, power supply control system, and administration apparatus
    Patent number: 7334139
    Abstract: A system performs the power supply control of a plurality of information processing apparatuses at a low cost without relation to the intrinsic function of the information processing apparatus and the existence of a network facility. The power supply control apparatus of the present invention can be connected to at least one information processing apparatus. The power supply control apparatus comprises a power supply circuit that supplies electrical power to the information processing apparatus, a network connecting unit that connects a network with an administration apparatus for detecting a failure in operating conditions of the information processing apparatus, and a power supply control unit that controls power supply of the supply circuit on the basis of a power supply on/off instruction received from the administration apparatus via the network connecting unit.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: February 19, 2008
    Assignee: Fujitsu Limited
    Inventor: Akinao Tanikawa
  • Power supply control apparatus, power supply control system, and administration apparatus
    Publication number: 20050144489
    Abstract: A system performs the power supply control of a plurality of information processing apparatuses at a low cost without relation to the intrinsic function of the information processing apparatus and the existence of a network facility. The power supply control apparatus of the present invention can be connected to at least one information processing apparatus. The power supply control apparatus comprises a power supply circuit that supplies electrical power to the information processing apparatus, a network connecting unit that connects a network with an administration apparatus for detecting a failure in operating conditions of the information processing apparatus, and a power supply control unit that controls power supply of the supply circuit on the basis of a power supply on/off instruction received from the administration apparatus via the network connecting unit.
    Type: Application
    Filed: December 16, 2004
    Publication date: June 30, 2005
    Applicant: Fujitsu Limited
    Inventor: Akinao Tanikawa
  • Direct memory access controlled system
    Patent number: 5016165
    Abstract: A direct memory access (DMA) controlled system which performs DMA data transfer between a main memory, a cache memory, and disk memories while exchanging DMA transfer requests and acknowledgements among disk control units, a memory-to-memory transfer control unit, and a common DMA control unit. The data transfer speed between the main memory and the cache memory is variable according to the load condition of the DMA control unit for the disk memories, enabling the transfer capability of the DMA control unit to be kept at a continually high level.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: May 14, 1991
    Assignee: Fujitsu Limited
    Inventors: Akinao Tanikawa, Toshiharu Ohshima, Toshihiro Sakai