Patents by Inventor Akira Sakurai

Akira Sakurai 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: 8737401
    Abstract: A communication apparatus comprises: a memory unit which correlates a label assigned to a packet and an address of a source of the packet, and memorizes them as an entry; a receiving unit which receives a packet from a network; a learning unit which judges whether or not there exists an entry corresponding to the received packet in the memory unit, and in case there exists no entry corresponding to the received packet in the memory unit, stores a label assigned to the received packet and an address of a source of the received packet in the memory unit; and a processing unit which, in case there exists an entry corresponding to the received packet in the memory unit, assigns an address corresponding to the received packet to the received packet.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: May 27, 2014
    Assignee: NEC Corporation
    Inventors: Zhenlong Cui, Kazuo Takagi, Akira Sakurai
  • Patent number: 8711686
    Abstract: Between a first pair of termination nodes, a first current-use packet transmission path and at least one first spare packet transmission path are defined. Between a second pair of termination nodes, a second current-use packet transmission path and at least one second spare packet transmission path are defined. When no network fault occurs, packets are transmitted between the pairs of nodes in a 1:1 transfer mode in which the pairs transfer packets via both current-use packet transmission paths only. When a network fault occurs in the first current-use packet transmission path, both transmissions are switched from a 1:1 transfer mode to a 1+1 transfer mode, in which the first pair of nodes transfer packets by using the first current-use packet transmission path and the first spare packet transmission path, and the second pair transfer packets by using the second current-use packet transmission path and the second spare packet transmission path.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: April 29, 2014
    Assignee: NEC Corporation
    Inventors: Kazuo Takagi, Zhenlong Cui, Masaki Umayabashi, Akira Sakurai
  • Patent number: 8564430
    Abstract: The present invention has the object of simplifying apparatus configuration and avoiding a requirement for calibration. The present invention achieves the above object by forming a detection sheet element that retains in a predetermined array pitch a plurality of conductive detection lines that are lead lines formed by etching or the like on a non-conductive thin film that can be exposed in a space environment. A detection circuit connected to each detection line of the detection sheet element is provided. When an object flying in space collides with the detection sheet body, since a detection line on the detection sheet element is ruptured, constant monitoring of the conductivity of the detection line by the detection circuit enables detection of the object flying in space that has collided with the detection sheet element when a detection line is ruptured.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: October 22, 2013
    Assignees: IHI Corporation, Institute for Q-Shu Pioneers of Space, Inc.
    Inventors: Yukihito Katazawa, Akira Sakurai
  • Patent number: 8450837
    Abstract: In a hybrid integrated circuit device, a circuit board on which an island portion of a lead is fixedly attached and a control board on which a control element and the like are mounted are disposed in an overlapping manner. The circuit board and the control board are integrally encapsulated with an encapsulating resin. A transistor disposed on an upper surface of the circuit board and a control element mounted on an upper surface of the control board are also covered by the encapsulating resin. Thus, a module in which an inverter circuit and a control circuit are integrally encapsulated with resin is provided.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: May 28, 2013
    Assignee: ON Semiconductor Trading, Ltd.
    Inventors: Shigeki Mashimo, Fumio Horiuchi, Kiyoaki Kudo, Akira Sakurai, Yuhki Inagaki
  • Publication number: 20130129738
    Abstract: Disclosed is an influenza virus infection inhibitor. Specifically disclosed is a pharmaceutical composition that is composed of an inhibitor such as an antibody which recognizes a peptide comprising the amino acid sequence of RERRRKKR (SEQ ID NO: 1) and inhibits the action of introducing an RR sequence into a cell. The influenza virus infection inhibitor is produced so as to contain the pharmaceutical composition.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 23, 2013
    Applicant: TOKYO METROPOLITAN INSTITUTE OF MEDICAL SCIENCE
    Inventors: Futoshi Shibasaki, Akira Sakurai
  • Publication number: 20130121165
    Abstract: A communication device includes a receiving unit configured to receive a frame via a connected packet network, a transmitting unit configured to transmit the received frame and a self-originating frame to the packet network, a monitoring unit configured to monitor a flow rate of the transmitted frames, a transmission cycle setting unit configured to cause a transmission cycle of the self-originating OAM frame to be a predetermined transmission cycle set for a normal condition when the flow rate of the frames is greater than or equal to a predetermined threshold, and a transmission cycle calculating unit configured to calculate a transmission cycle of the OAM frame that can compensate for a shortfall in the number of the transmitted frames, the transmission cycle calculating unit being configured to cause the calculated transmission cycle to be a transmission cycle of the self-originating OAM frame when the flow rate of the frames is less than the predetermined threshold.
    Type: Application
    Filed: July 22, 2011
    Publication date: May 16, 2013
    Applicant: NEC CORPORATION
    Inventors: Kohei Okazaki, Akira Sakurai
  • Publication number: 20120219003
    Abstract: [Issues] To provide a node (transfer device) which can process an OAM frame within an output line card. [Solution Method] A node according to the present invention is used in an MPLS (Multi Protocol Label Switching) network, and the node includes an input unit which receives an OAM (Operation Administration and Maintenance) frame including TTL (Time To Live) from outside of the node and an output unit which transmits an OAM frame to outside of the node, wherein the input unit sets the TTL to a specific value and transmits the received OAM frame to the output unit in case a termination destination which an OAM frame received from outside indicates is the node and the received OAM frame is to be transmitted to the output unit and the output unit terminates an OAM frame transmitted from the input unit.
    Type: Application
    Filed: November 2, 2010
    Publication date: August 30, 2012
    Applicant: NEC CORPORATION
    Inventors: Zhenlong Cui, Hiroyuki Takagi, Masaki Umayabashi, Kazuo Takagi, Akira Sakurai, Hiroshi Tanaka
  • Publication number: 20120189011
    Abstract: A communication apparatus comprises: a memory unit which correlates a label assigned to a packet and an address of a source of the packet, and memorizes them as an entry; a receiving unit which receives a packet from a network; a learning unit which judges whether or not there exists an entry corresponding to the received packet in the memory unit, and in case there exists no entry corresponding to the received packet in the memory unit, stores a label assigned to the received packet and an address of a source of the received packet in the memory unit; and a processing unit which, in case there exists an entry corresponding to the received packet in the memory unit, assigns an address corresponding to the received packet to the received packet.
    Type: Application
    Filed: January 17, 2012
    Publication date: July 26, 2012
    Inventors: ZHENLONG CUI, Kazuo Takagi, Akira Sakurai
  • Publication number: 20120093171
    Abstract: A data transfer device 210 is equipped with a plurality of communication ports 211a and 211b, a communication establishment processor 212, and a communication maintenance processor 213. The communication establishment processor 212 transmits and receives communication establishing information for establishing communication with an external device connected via the communication port to and from the external device. The communication maintenance processor 213 is configured to operate independently of the communication establishment processor 212 and, every time a predetermined transmission period elapses, transmits communication maintaining information for maintaining the establishment of communication with the external device, to the external device.
    Type: Application
    Filed: November 13, 2009
    Publication date: April 19, 2012
    Inventors: Atsuya Yamashita, Tsutoma Mieno, Hiroaki Nakajima, Akira Sakurai
  • Publication number: 20120074552
    Abstract: In a hybrid integrated circuit device, a circuit board on which an island portion of a lead is fixedly attached and a control board on which a control element and the like are mounted are disposed in an overlapping manner. The circuit board and the control board are integrally encapsulated with an encapsulating resin. A transistor disposed on an upper surface of the circuit board and a control element mounted on an upper surface of the control board are also covered by the encapsulating resin. Thus, a module in which an inverter circuit and a control circuit are integrally encapsulated with resin is provided.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 29, 2012
    Applicant: ON Semiconductor Trading, Ltd.
    Inventors: Shigeki Mashimo, Fumio Horiuchi, Kiyoaki Kudo, Akira Sakurai, Yuhki Inagaki
  • Publication number: 20120075816
    Abstract: In a hybrid integrated circuit device of the present invention, leads are fixedly attached on the upper surface of a circuit board. The lead includes an island portion, a slope portion, and a lead portion. A transistor and a diode are mounted on the upper surface of the island portion. Electrodes provided on the upper surfaces of the transistor and the diode are connected to a bonding portion through a fine metal wire. The bonding portion of the lead is disposed at a higher position than the island portion. Thus, the fine metal wires connected to the bonding portion are separated from each other.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Applicant: ON Semiconductor Trading, Ltd.
    Inventors: Shigeki MASHIMO, Fumio Horiuchi, Kiyoaki Kudo, Akira Sakurai, Yuhki Inagaki
  • Publication number: 20120051214
    Abstract: A packet transmission system includes a plurality of nodes connected by a packet transmission path. A current-use packet transmission path is used as the packet transmission path when a fault does not occur, and a spare packet transmission path is used as the packet transmission path when the fault has occurred.
    Type: Application
    Filed: August 29, 2011
    Publication date: March 1, 2012
    Inventors: KAZUO TAKAGI, Zhenlong Cui, Masaki Umayabashi, Akira Sakurai
  • Publication number: 20110244813
    Abstract: This communication system is equipped with a plurality of transceiver devices each composed of a transmission device that transmits unit data and a reception device that receives unit data from the transmission device. The transmission devices are connected in series. Each of the transmission devices stores identification information for identifying the device itself. The transmission device accepts unit data from a front stage side. The transmission device generates identification information for identifying one of the transmission devices from information included in the accepted unit data, in accordance with a predetermined generation process. In a case that the generated identification information corresponds to the stored identification information, the transmission device transmits the accepted unit data to the reception device.
    Type: Application
    Filed: November 13, 2009
    Publication date: October 6, 2011
    Inventors: Taiki Kanai, Akira Sakurai, Atsuya Yamashita, Hiroaki Nakajima
  • Patent number: 7959300
    Abstract: A projection image display device including a display plane for displaying an image, a projection mechanism projecting an image on the display plane, and an imaging mechanism arranged on the same side of the display plane as the projection mechanism for imaging the display plane. The imaging mechanism is arranged at a position where a position symmetric with respect to the display plane of the projection mechanism is out of the range of the field angle of the imaging mechanism. By arranging the imaging mechanism at a position where no direct reflecting light of the light source of the projection mechanism comes, it is possible to prevent generation of a hot spot.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: June 14, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiroh Hirahara, Akira Sakurai
  • Patent number: 7951315
    Abstract: The present invention is to provide a polyvinyl chloride (PVC) fiber for artificial hair. The PVC fiber is manufactured by melt spinning a PVC resin composition with a nozzle, wherein the nozzle has a nozzle hole having a diameter D and a land length L, and a nozzle leading portion having a cone angle, and wherein a ratio of L/D is 1-3, a height of the nozzle leading portion is at least 4 mm, and the cone angle is 20°-90°. The resulting PVC fiber has an arithmetic mean roughness of 0.18-0.38 ?m and a maximum height of 0.5-3.5 ?m along a longitudinal direction, specified by JIS B 0601.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: May 31, 2011
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Akira Sakurai, Akira Moroi
  • Publication number: 20110050258
    Abstract: The present invention has the object of simplifying apparatus configuration and avoiding a requirement for calibration. The present invention achieves the above object by forming a detection sheet element that retains in a predetermined array pitch a plurality of conductive detection lines that are lead lines formed by etching or the like on a non-conductive thin film that can be exposed in a space environment. A detection circuit connected to each detection line of the detection sheet element is provided. When an object flying in space collides with the detection sheet body, since a detection line on the detection sheet element is ruptured, constant monitoring of the conductivity of the detection line by the detection circuit enables detection of the object flying in space that has collided with the detection sheet element when a detection line is ruptured.
    Type: Application
    Filed: January 16, 2009
    Publication date: March 3, 2011
    Applicants: IHI CORPORATION, INSTITUTE FOR Q-SHU PIONEERS OF SPACE, INC.
    Inventors: Yukihito Katazawa, Akira Sakurai
  • Publication number: 20100233390
    Abstract: To provide a fiber made of a vinyl chloride resin which is excellent in heat resistance and thus hardly shrinks thermally even at a temperature exceeding 100° C. The fiber obtained by melt-spinning a resin composition comprising a vinyl chloride resin and from 1 to 300 parts by mass of a polyester resin based on 100 parts by mass of the vinyl chloride resin, wherein the vinyl chloride resin has a viscosity average polymerization degree of from 600 to 2,500; the polyester resin is a polylactic acid type resin; and the polyester resin has the melting point of from 100 to 300° C.
    Type: Application
    Filed: February 22, 2007
    Publication date: September 16, 2010
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Akira Sakurai, Yukihisa Hoshino
  • Patent number: 7740049
    Abstract: A method of manufacturing a cylinder block using a die apparatus wherein a columnar hole includes a bore in the cylinder block. The method includes the steps of abutting first and second split cores against an upper surface of a distal end core, the upper surface being located opposite the inner core, and introducing a molten metal into a cavity. An inner core is withdrawn to move the first and second split cores toward an axis. The first and second split cores are released from a formed product made of solidified molten metal. The split cores are removed from the formed product to form the bore, and an inner surface of the bore is cut.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: June 22, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Akira Sakurai, Hajime Miyasaka, Yoshimichi Asai, Hiroyuki Ohashi, Kazumi Nagao
  • Patent number: 7629048
    Abstract: Polyvinyl chloride fibers obtainable by molding a resin composition containing 100 parts by weight of a vinyl chloride resin, from 3 to 20 parts by weight of a compatible chlorinated vinyl chloride resin, from 10 to 30 parts by weight of a heat resistant chlorinated vinyl chloride resin, and from 0.1 to 10 parts by weight of a heat stabilizer into a fibrous form, the compatible chlorinated vinyl chloride resin having a chlorine content of from 57 to 64% by weight and an average degree of polymerization of from 450 to 800; and the heat resistant chlorinated vinyl chloride resin having a chlorine content of from 65 to 71% by weight and an average degree of polymerization of from 450 to 1,100, to a process of producing the same and to applications thereof.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: December 8, 2009
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Akira Sakurai, Masamichi Kanaoka, Akira Moroi
  • Patent number: 7590159
    Abstract: A surface-emission laser diode includes a distributed Bragg reflector tuned to wavelength of 1.1 ?m or longer, wherein the distributed Bragg reflector includes an alternate repetition of a low-refractive index layer and a high-refractive index layer, with a heterospike buffer layer having an intermediate refractive index interposed therebetween with a thickness in the range of 5-50 nm.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: September 15, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoto Jikutani, Shunichi Sato, Takashi Takahashi, Akihiro Itoh, Takuro Sekiya, Akira Sakurai, Masayoshi Katoh, Teruyuki Furuta, Kazuya Miyagaki, Ken Kanai, Atsuyuki Watada, Koei Suzuki, Satoru Sugawara, Shinji Satoh, Shuuichi Hikichi