Patents by Inventor Tsutomu Shibata

Tsutomu Shibata 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: 8140844
    Abstract: A presence table stores therein presence information. A storage unit stores therein in associated manner a terminal identifier unique each of a plurality of terminals and an encryption key to be used for multicast communication within a multicast group. A receiving unit receives a subscription request message from a first terminal from among the terminals. The subscription message includes the terminal identifier of the first terminal, and a request requesting subscription to the presence information present in the storage unit. An acquiring unit acquires the encryption key from the storage unit by using the terminal identifier of the first terminal. A transmitting unit transmits acquired encryption key to the first terminal.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: March 20, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20120013241
    Abstract: The object of the invention is to provide a spark plug including a central electrode and/or a ground electrode, which can suppress generation of corrosion-like generated foreign substances while maintaining high thermal conductivity and high strength. The spark plug according to the invention is a spark plug including a central electrode and a ground electrode provided to have a gap between the central electrode and the ground electrode with at least one of the central electrode and the ground electrode formed from an electrode material including 96% by mass or more of Ni, in which the electrode material includes a total content of from 0.05% by mass to 0.45% by mass of at least one selected from a group consisting of Y and rare earth elements, 0.05% by mass or more of Mn, and a total content of 0.01% by mass or more of at least one selected from a group consisting of Ti, V, and Nb, and the ratio (a/b) of the total content (a) of Ti, V, and Nb to the content (b) of Mn is from 0.02 to 0.40.
    Type: Application
    Filed: October 15, 2010
    Publication date: January 19, 2012
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Tsutomu Shibata, Takehito Kuno, Tomoo Tanaka, Kenji Nunome, Shoichiro Nagatomo
  • Patent number: 8092269
    Abstract: A decrease in yield and degradation of productivity can be avoided when a spark plug having an insulator with low mechanical strength is manufactured. In a second process, a terminal electrode 15 is inserted to a predetermined position in a state where an insulator 12 is heated to a temperature equal to or greater than the softening temperatures of first to third powder materials 16P, 17P, and 18P such that the first powder material 16P becomes a first conductive sealing material layer 16, the second powder material 17P becomes a resistor 17, and the third powder material 18P becomes a second conductive sealing material layer 18. In addition, a speed at which the terminal electrode 15 is inserted is reduced between the start and the end of the second process.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: January 10, 2012
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Tsutomu Shibata, Ryoji Kato, Atsushi Tsukada
  • Publication number: 20110248620
    Abstract: Provided is a spark plug which allows a predetermined resistance to be imparted to a resistor with restraint of variation in resistance of the resistor and in turn, enables enhancement of yield. The spark plug includes a ceramic insulator having an axial hole extending in the direction of an axis CL1, a center electrode, and a terminal electrode. A resistor is provided in the axial hole through sintering of a resistor composition which contains a conductive material such as carbon black, glass powder, and ceramic particles other than glass. As viewed on a section of the resistor taken along a direction orthogonal to the axis CL1, 50% or more of sintered glass powder formed through sintering of the glass powder has a circularity of 0.8 or greater.
    Type: Application
    Filed: December 24, 2009
    Publication date: October 13, 2011
    Applicant: NGK Spark Plug Co., LTD.
    Inventors: Tsutomu Shibata, Keita Nakagawa
  • Publication number: 20110204766
    Abstract: A spark plug (100) has a resistor (15) between a center electrode 3 and a metal terminal (13). The resistor (15) contains glass, ceramic powder, an electrically conductive material, and metal. An average of two or more particles of the metal are present in an arbitrary region measuring 300 (?m)×300 (?m) on an arbitrary section of the resistor (15), and the total sectional area of the metal present in the region accounts for less than 1.6% of the region.
    Type: Application
    Filed: October 30, 2009
    Publication date: August 25, 2011
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Haruki Yoshida, Keita Nakagawa, Tsutomu Shibata
  • Patent number: 7984159
    Abstract: The resource controlling unit controls a resource usage state. The receiving unit receives from a first terminal a first message containing a first condition for maintaining a connection that is used to transfer a message exchanged between the first terminal and the second terminal. Based on the first condition contained in the received first message and the resource usage state, the determining unit determines a second condition that is to be accepted for maintaining the connection. The adding unit adds the second condition to the first message. The transmitting unit transmits the first message to which the second condition is added to an external device or the second terminal. The maintaining unit maintains the connection under the second condition.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: July 19, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Patent number: 7974721
    Abstract: A fabrication aiding apparatus capable of easily and properly setting a margin line is provided. The apparatus includes a RAM (Random Access Memory) to store three-dimensional shape data on a model of an abutment tooth to which a dental prosthesis is applied, an accepting section to accept the input of specification of an angle formed between a line defining a contact point and a reference axis on a face containing the reference axis in the model, a contact point detecting section to detect, based on the three-dimensional shape data, three-dimensional position information about a contact with the line forming a specified angle with the reference axis on the face containing the reference axis in the model, and a margin determining section to determine, based on coordinates of a contact point, three-dimensional position information of a margin line in the model.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: July 5, 2011
    Assignee: GC Corporation
    Inventors: Tsutomu Shibata, Yoshinori Matsuda
  • Publication number: 20110133626
    Abstract: A spark plug having sufficient durability for an internal combustion engine is provided by restraining a sharp increase in resistance of a resistor while the size of the spark plug is reduced. The spark plug comprises an insulator having an axial hole, a metallic shell provided on the outer circumference of the insulator, a center electrode inserted into a front end portion of the axial hole, a terminal electrode inserted into a rear end portion of the axial hole, and a ground electrode. A circular columnar resistor is disposed within the axial hole between the center electrode and the terminal electrode, thereby electrically connecting the center electrode and the terminal electrode. The resistor is composed of carbon black serving as a conductive material, a glass powder, and ceramic particles. The ceramic particles have a maximum particle size of 0.5 ?m or less.
    Type: Application
    Filed: June 1, 2009
    Publication date: June 9, 2011
    Inventors: Tsutomu Shibata, Keita Nakagawa
  • Publication number: 20100264823
    Abstract: A spark plug with excellent vibration resistance performance and resistor load life-span characteristics, and a reduced diameter which is achieved by strengthening adhesion between a resistor and a conductive glass sealing layer.
    Type: Application
    Filed: March 23, 2009
    Publication date: October 21, 2010
    Inventors: Akira Suzuki, Tomoaki Kato, Tsutomu Shibata, Mamoru Musasa
  • Publication number: 20100233929
    Abstract: A decrease in yield and degradation of productivity can be avoided when a spark plug having an insulator with low mechanical strength is manufactured. In a second process, a terminal electrode 15 is inserted to a predetermined position in a state where an insulator 12 is heated to a temperature equal to or greater than the softening temperatures of first to third powder materials 16P, 17P, and 18P such that the first powder material 16P becomes a first conductive sealing material layer 16, the second powder material 17P becomes a resistor 17, and the third powder material 18P becomes a second conductive sealing material layer 18. In addition, a speed at which the terminal electrode 15 is inserted is reduced between the start and the end of the second process.
    Type: Application
    Filed: March 23, 2009
    Publication date: September 16, 2010
    Inventors: Tsutomu Shibata, Ryoji Kato, Atsushi Tsukada
  • Publication number: 20100048083
    Abstract: A process for forming a glass seal layer in a spark plug, comprising an inserting step of inserting a terminal electrode into an axial hole in an insulator, a hot compression step of pushing the terminal electrode in a heated state to thereby compress the glass powder mixture, and a cooling step of performing cooling to thereby form the glass seal layer.
    Type: Application
    Filed: August 12, 2009
    Publication date: February 25, 2010
    Inventors: Tsutomu Shibata, Hoju Fukushima
  • Publication number: 20090300197
    Abstract: According to one embodiment, there is provided an Internet Protocol communication system provided with terminal devices configured to mutually communicate with one another via an IP network and a server unit which performs digest authentication in response to authentication requests transmitted from the terminal device. The server unit comprises an authentication processing module which transmits challenge values to terminal devices of authentication request sources, and verifies response values returned to the challenge values, and a determination module which determines results of the digest authentication on the basis of the results of the verification. At least one of the terminal devices comprises an authentication client module which generates the response values by using a defined algorithm in accordance with user passwords input by users, and with device passwords stored in advance, and returns the response values to the server unit.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 3, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi Tanizawa, Tsutomu Shibata, Naoki Esaka
  • Patent number: 7626320
    Abstract: An object of the present invention is to provide a spark plug which has more excellent impact resistance with electrical conductivity and airtightness kept excellent. In the invention, each of first and second electrically conductive sealing layers (17) and (19) is made of electrically conductive glass containing a glass component and a metal component. The metal component at least contains a Cu—Zn alloy which contains Cu as a first component, and Zn as a second component.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: December 1, 2009
    Assignee: NGK Spark Plug Co., Ltd.
    Inventor: Tsutomu Shibata
  • Publication number: 20090238172
    Abstract: A transfer unit transfers a message between a network and an external terminal. An input unit inputs a user ID for identifying a user. A generating unit generates a registration message requesting a registration of address information of the user. A transmitting unit transmits the registration message to a server. A receiving unit receives a response message including registration information and connection information from the server. When the connection information indicates a permission of a connection of the external terminal to the network, a control unit controls the transfer unit to transfer the message between the network and the external terminal.
    Type: Application
    Filed: February 4, 2009
    Publication date: September 24, 2009
    Inventors: Yoshimichi TANIZAWA, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090168642
    Abstract: According to one embodiment of the invention, there is provided a telephone system comprises nodes connected to a first network of a packet exchange type and a second network of a volume-based charging type. The nodes mutually form a communication route. The system comprises terminal devices each connected to any one of the nodes and configured to mutually perform telephone communication via the route. Each of the nodes comprises a detector monitors a state of first network to detect failure in the first network, a reroute processor reroutes a part of the route into second network via a relay node to be an interface between the networks to avoid the detected failure, and a decision processor decides a relay node to minimize a cost required for the route to pass the second network. The reroute processor reroutes the route via the relay node decided by the decision processor.
    Type: Application
    Filed: October 16, 2008
    Publication date: July 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tsutomu Shibata
  • Publication number: 20090109963
    Abstract: The storage unit stores therein authentication IDs that are used for authentication of users and address information in association with one another. The authentication processing unit receives from a PC an authentication message that includes an authentication ID and is used for the authentication of the user of a communication terminal, and performs authentication on the user based on the received authentication message. The SIP address acquiring unit acquires from the storage unit address information that corresponds to the authentication ID included in the authentication message when the user is authenticated. The SIP address registering unit sends the SIP location server a registration request for registering the acquired address information as the address information of the user of the IP telephone terminal associated with the PC that transmits the authentication message.
    Type: Application
    Filed: September 2, 2008
    Publication date: April 30, 2009
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090025079
    Abstract: A switching equipment stores identification information of communication established with respect to an infrastructure network system in a storage unit, and when an access request is received from a terminal device, the switching equipment adds the stored identification information to the access request and transfers the access request to a 1× Radius server. When the terminal device having requested the access is authenticated, the 1× Radius server notifies a PANA PAA of address information of the terminal device associated with the identification information added to the access request. The PANA PAA approves the same network access as the switching equipment with respect to the terminal device in the received address information.
    Type: Application
    Filed: May 29, 2008
    Publication date: January 22, 2009
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090016339
    Abstract: A call-forwarding destination judging unit included in an SIP proxy estimates whether call forwarding will be required, based on the type of an SIP message. When it has been estimated that call forwarding will be required, the call-forwarding destination judging unit also estimates the destination of the call forwarding. With this arrangement, when the delivery of the SIP message requires call forwarding, it is possible to establish, in advance, a TLS connection with the SIP terminal being the destination of the call forwarding. Thus, it is possible to eliminate the need to establish the TLS connection at the time when the call is actually forwarded.
    Type: Application
    Filed: March 6, 2008
    Publication date: January 15, 2009
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090005721
    Abstract: Provided is a packaged iontophoresis system 15 including: an iontophoresis system 10 including an apparatus body 50 for transdermally delivering an ionized drug by iontophoresis, and a connection part 70 extended from the apparatus body 50 and connected to the apparatus body 50 and a power source 60, the power source 60 supplying power to the apparatus body 50; a package material 80 hermetically packaging the apparatus body 50 and a portion of the connection part 70, by at least a part thereof being welded to the connection part 70; and a cutting guide 400 guiding a cutting line of the package material 80 so that the part of the package material 80 welded to the connection part 70 remains at the connection part 70 when the package material 80 is opened.
    Type: Application
    Filed: June 9, 2008
    Publication date: January 1, 2009
    Applicant: TTI ELLEBEAU, INC.
    Inventors: Mizuo Nakayama, Takehiko Matsumura, Tsutomu Shibata, Akihiro Ryuka
  • Publication number: 20080267371
    Abstract: According to one embodiment, telephone system includes terminals can make telephone communication, call processor sets links connecting terminals at outgoing callers and terminals at incoming callers in response to outgoing call requests, and status manager manages statuses of terminals, wherein the terminal comprises display displays information, display controller displays a list of partner's destinations of communication of user registered in advance onto display, call processor reports outgoing call request for setting link between a terminal selected by user from list and a terminal of user to call processor, acquisition processor acquires status information showing statuses of terminals regarding partner's destinations on list, and management processor manages security levels of links set between terminal of user and terminals of partner's destinations on list on the basis of status information, and display controller displays security levels on display by associating with each of security levels of par
    Type: Application
    Filed: April 8, 2008
    Publication date: October 30, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tsutomu Shibata