Patents by Inventor Tomohisa Yamaguchi

Tomohisa Yamaguchi 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).

  • Patent number: 5905847
    Abstract: A client-server system which improves efficiency of each server by distributing loads to a plurality of servers having a plurality of storages for sequentially storing data which are distributed in each of the plurality of storages; a plurality of servers, each of which is connected to the plurality of storages, for accessing the data distributed and stored in each of the plurality of storages; an administration apparatus which is connected to the plurality of servers for administrating the data sequentially stored in the plurality of storages, and the plurality of servers; and a client which is connected to both the administration apparatus and the plurality of servers, the clients specifies a server which is connected to a storage where a head block of the data is stored by inquiring to the administration apparatus, and accesses the data in the plurality of servers according to the order of the data storage sequence from the specified server.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: May 18, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tsuyoshi Kobayashi, Shunichiro Nakamura, Harumi Minemura, Tomohisa Yamaguchi
  • Patent number: 5841962
    Abstract: A data allocator which allocates data and redundant data for recovering the data. The data allocator has k storage groups, each of which includes m array files. Each array file includes multiple memory areas for storing the data and the redundant data on a block basis. A redundant group is formed which consists of k memory areas, each of which is selected from the same row of each one of k storage groups, and one of the k memory areas stores the redundant data and the remaining (k-1) memory areas store the data. The redundant data are uniformly allocated to m.sup.k sets of memory areas (D.sub.ij1, D.sub.2j2, . . . , D.sub.kjk) of the same rows of the storage groups, where j.sub.i (j.sub.i =1-m) is the number of the array file in each of the storage groups, and D.sub.kjk is the memory area belonging to k-th storage group and j.sub.k -th array file of the k-th storage group.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: November 24, 1998
    Assignees: Mitsubishi Denki Kabushiki Kaisha, T. Watanabe
    Inventors: Shunichiro Nakamura, Hiroshi Shimizu, Harumi Minemura, Tomohisa Yamaguchi, Takashi Watanabe, Tadanori Mizuno
  • Patent number: 5630007
    Abstract: The invention relates to a client-server system which improves efficiency of each server by distributing loads to a plurality of servers. The a client-server system comprises a plurality of storages for sequentially storing data which are distributed in each of the plurality of storages; a plurality of servers, each of which is connected to the plurality of storages, for accessing the data distributed and stored in each of the plurality of storages; an administration apparatus which is connected to the plurality of servers for administrating the data sequentially stored in the plurality of storages, and the plurality of servers; and a client which is connected to both the administration apparatus and the plurality of servers, the clients specifies a server which is connected to a storage where a head block of the data is stored by inquiring to the administration apparatus, and accesses the data in the plurality of servers according to the order of the data storage sequence from the specified server.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: May 13, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tsuyoshi Kobayashi, Shunichiro Nakamura, Harumi Minemura, Tomohisa Yamaguchi
  • Patent number: 5237693
    Abstract: The system for accessing a plurality of devices connected in a network by using a system call, said system capable of accessing a device connected with any one of nodes through the network, the system includes a unit for detecting a device requested to be accessed and a node connected with the device through the network, a unit for converting the system call into a protocol at a time when the device to be accessed is connected with a different node from which the access is not issued, a unit for transmitting the protocol from the node to the different node through the network, and a unit for reconverting the protocol transmitted into the system call so that the system call is executed.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: August 17, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshimi Kiyohara, Tomohisa Yamaguchi
  • Patent number: 4759446
    Abstract: A packing structure for packing an article in a packing box includes a belt-like attaching member provided with a handle. The attaching member is wound around the article. By gripping and pulling the handle the article can easily be taken out from the packing box, without damage to the article.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: July 26, 1988
    Assignee: Alps Electric Co., Ltd.
    Inventors: Koichi Dobashi, Tomohisa Yamaguchi