Patents by Inventor Masaaki Iwata

Masaaki Iwata 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: 7539763
    Abstract: A community server categorizes and accumulates messages exchanged by users on a virtual community for respective topics. The community server includes a subscription type setting unit, which provides, to each user and predetermined administrator, a mechanism for selecting a subscription type indicating the way each user subscribes to messages posted to the virtual community. For this purpose, the subscription type setting unit manages the subscription types of respective users for each community using a subscription type table of community management information, and changes the subscription type in the subscription table in accordance with a request from each user and administrator.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: May 26, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mayo Toyota, Hitoshi Tanigawa, Masaaki Iwata, Kazunori Shimakawa
  • Patent number: 7069300
    Abstract: A community server categorizes and accumulates messages exchanged by users on a virtual community for respective topics. Since the community server includes a thread moving unit, i.e., a mechanism that allows an administrator to move a thread as a set of messages posted to a given virtual community to another virtual community, each user can utilize collected and accumulated knowledge via his or her desired interface. Since the administrator can move a thread between communities, virtual communities can be combined or divided.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: June 27, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mayo Toyota, Hitoshi Tanigawa, Masaaki Iwata, Kazunori Shimakawa
  • Patent number: 6627399
    Abstract: An RNA polymerase transcription accelerator comprising a compound represented by the following Formula (I) or salts thereof. A method of sequencing DNA in which nucleic acid transcripts are obtained using an RNA polymerase and a DNA fragment as a template, the resulted nucleic acid transcripts are separated, the nucleic acid sequence is determined from the separated fractions wherein the nucleic acid transcription reaction is carried out in the presence of a compound selected from a group of compounds represented by the above formula (I). The polyamine compounds above have outstanding accelerating activity on transcription activity of RNA polymerase. Therefore, use of the polyamine compounds in a DNA sequencing method using RNA polymerase can make a length of DNA sequence that can be determined in one sequencing longer.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: September 30, 2003
    Assignee: Riken
    Inventors: Masaaki Iwata, Yoshihide Hayashizaki
  • Patent number: 6605645
    Abstract: Nobel polyamine compounds and polyamine compounds having carcinostatic action are provided. There are also provided anticancer agents containing as active ingredient at least one of polyamine compounds represented by the following Formula (I) or (III) and/or pharmaceutically acceptable salts thereof. Specifically, there are provided anticancer agents containing as active ingredient at least one of 1,18-bis(ethylamino)-5,14-diazaoctadecane, 1,16-bis(cyclopropylmethylamino)-5,12-diazahexadecane, 1,17-bis(cyclopropylmethylamino)-5,13-diazaheptadecane and/or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: August 12, 2003
    Assignee: Riken
    Inventor: Masaaki Iwata
  • Publication number: 20030073202
    Abstract: An RNA polymerase transcription accelerator comprising a compound represented by the following Formula (I) or salts thereof.
    Type: Application
    Filed: June 28, 2002
    Publication date: April 17, 2003
    Inventors: Masaaki Iwata, Yoshihide Hayashizaki
  • Publication number: 20030028596
    Abstract: A community server categorizes and accumulates messages exchanged by users on a virtual community for respective topics. The community server includes a user access limiting control unit. The user access limiting control unit determines user's access authority of each client terminal for each community as an access destination. For this purpose, the user access limiting control unit manages a community type indicating the open level of each community, and a member type indicating the participation attribute of each user to the virtual community, using community management information, and limits access to a community as an access destination for each client terminal on the basis of the combination of the community type and member type.
    Type: Application
    Filed: February 28, 2002
    Publication date: February 6, 2003
    Applicant: KABUSHIKI TOSHIBA
    Inventors: Mayo Toyota, Hitoshi Tanigawa, Masaaki Iwata, Kazunori Shimakawa
  • Publication number: 20030014482
    Abstract: A community server categorizes and accumulates messages exchanged by users on a virtual community for respective topics. Since the community server includes a thread moving unit, i.e., a mechanism that allows an administrator to move a thread as a set of messages posted to a given virtual community to another virtual community, each user can utilize collected and accumulated knowledge via his or her desired interface. Since the administrator can move a thread between communities, virtual communities can be combined or divided.
    Type: Application
    Filed: February 28, 2002
    Publication date: January 16, 2003
    Applicant: KABUSHIKI TOSHIBA
    Inventors: Mayo Toyota, Hitoshi Tanigawa, Masaaki Iwata, Kazunori Shimakawa
  • Publication number: 20020174179
    Abstract: A community server categorizes and accumulates messages exchanged by users on a virtual community for respective topics. The community server includes a subscription type setting unit, which provides, to each user and predetermined administrator, a mechanism for selecting a subscription type indicating the way each user subscribes to messages posted to the virtual community. For this purpose, the subscription type setting unit manages the subscription types of respective users for each community using a subscription type table of community management information, and changes the subscription type in the subscription table in accordance with a request from each user and administrator.
    Type: Application
    Filed: February 27, 2002
    Publication date: November 21, 2002
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Mayo Toyota, Hitoshi Tanigawa, Masaaki Iwata, Kazunori Shimakawa
  • Publication number: 20020067472
    Abstract: Nobel polyamine compounds and polyamine compounds having carcinostatic action are provided. There are also provided anticancer agents containing as active ingredient at least one of polyamine compounds represented by the following Formula (I) or (III) and/or pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: October 16, 2001
    Publication date: June 6, 2002
    Inventor: Masaaki Iwata
  • Patent number: 6319956
    Abstract: Nobel polyamine compounds and polyamine compounds having carcinostatic action are provided. There are also provided anticancer agents containing as active ingredient at least one of polyamine compounds represented by the following Formula (I) or (III) and/or pharmaceutically acceptable salts thereof. Specifically, there are provided anticancer agents containing as active ingredient at least one of 1,18-bis(ethylamino)-5,14-diazaoctadecane, 1,16-bis(cyclopropylmethylamino)-5,12-diazahexadecane, 1,17-bis(cyclopropylmethylamino)-5,13-diazaheptadecane and/or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: November 20, 2001
    Assignee: Riken
    Inventor: Masaaki Iwata
  • Patent number: 6275404
    Abstract: An AC generator for a vehicle includes a rotor, a stator having a three-phase stator winding, a three-phase full-wave rectifier unit, an insulation cover, and a frame for rotatably supporting the rotor. The rectifier unit includes a cooling fin structure having at least three positive diodes and three negative diodes fixed thereto and a terminal member having a wiring member connecting the positive and negative diodes to form the three-phase full-wave rectifier unit and three first partition members. The wiring member has first connecting portions connected to the positive and negative diodes and second connecting portions connected to three output leads of the stator winding. Each of the first partition members extend toward the insulation cover between one of the first connecting portions and the cooling fin structure.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: August 14, 2001
    Assignee: DENSO Corporation
    Inventors: Akiya Shichijyo, Hiroaki Ishikawa, Atsushi Umeda, Masaaki Iwata, Takafumi Tsuge, Shigenobu Nakamura