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).

  • Publication number: 20240145178
    Abstract: A solid electrolytic capacitor (1) includes an anode foil (2a) having formed thereon an oxide film, a cathode foil (2c), and a separator (2d), and is equipped with a solid electrolyte (20) formed of an electroconductive polymer compound in a fine particle form, and a water-soluble compound solution (30) introduced to surround the solid electrolyte (20), the solid electrolyte (20) contains a polyol compound having a molecular weight of less than 200 and a number of hydroxy groups of 4 or more as a first water-soluble compound (2f1), the water-soluble compound solution (30) contains one kind or multiple kinds of a glycol compound in a liquid form as a second water-soluble compound (2f2), and the second water-soluble compound (2f2) has an average molecular weight of less than 400.
    Type: Application
    Filed: January 10, 2024
    Publication date: May 2, 2024
    Inventors: Masayuki SAKAGUCHI, Tetsushi OGAWARA, Yoshishige SAKURAI, Akira IIJIMA, Yosuke NOZAWA
  • Patent number: 11934558
    Abstract: A distributed data integration device includes an acquisition unit configured to acquire, for a piece of analysis target data, an anchor data intermediate representation and an analysis target intermediate representation, the anchor data intermediate representation being an intermediate representation obtained by converting anchor data by a first function, the anchor data being data commonly used in integration of a plurality of the pieces of analysis target data that are distributed, the analysis target intermediate representation being an intermediate representation obtained by converting the analysis target data by the first function, an anchor data conversion unit configured to convert, for the piece of analysis target data, a plurality of the anchor data intermediate representations by a second function, a calculation unit configured to calculate, for the piece of analysis target data, the second function that minimizes a difference between the plurality of the anchor data intermediate representations, a
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: March 19, 2024
    Assignee: University of Tsukuba
    Inventors: Akira Imakura, Tetsuya Sakurai
  • Patent number: 11921341
    Abstract: An optical cable includes: twisted optical fiber units each including a fiber group formed by optical fibers. At least one of the optical fiber units includes a filling that wraps an outer circumference of the fiber group.
    Type: Grant
    Filed: January 17, 2023
    Date of Patent: March 5, 2024
    Assignees: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masatoshi Ohno, Akira Namazue, Ken Osato, Yusuke Yamada, Yuta Maruo, Akira Sakurai, Shigekatsu Tetsutani, Hiroaki Tanioka
  • Publication number: 20240069297
    Abstract: In an optical fiber cable in which an optical fiber ribbon formed by parallelly arranging a plurality of optical fibers is packaged in an internal space, a core portion of each optical fiber is made of pure quartz and an effective cross-sectional area of the core portion at a wavelength of 1,550 nm is 110 ?m2 or more and 150 ?m2 or less. The optical fiber ribbon is an optical fiber ribbon in which the optical fibers are connected by continuously applying an adhesive resin between adjacent optical fibers. An occupation ratio of the optical fiber ribbon to the internal space calculated from a ratio of a cross-sectional area of the internal space to a cross-sectional area of the packaged optical fiber ribbon is 25% or more and 55% or less.
    Type: Application
    Filed: November 10, 2021
    Publication date: February 29, 2024
    Inventors: Yutaka HASHIMOTO, Fumiaki SATO, Masashi KIKUCHI, Akira SAKURAI, Yusuke YAMADA
  • Patent number: 11846819
    Abstract: An object is to provide a closure with a structure having a drainage function to eliminate water immersion into a coated optical fiber against temporary flooding and to prevent water from continuously contacting the coated optical fiber. Another object is to provide a closure with improved workability for opening and closing. A closure according to the present invention protects a connection part that connects a coated optical fiber enclosed in a optical fiber cable with a coated optical fiber enclosed in a optical fiber cable. The closure includes a coated optical fiber housing that divides an interior of the closure into a first space that is on a side of a road and has a main body cable insertion hole for inserting the optical fiber cables from an exterior and a second space that is on an opposite side of the road and includes the connection part.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: December 19, 2023
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira Sakurai, Hiroaki Tanioka, Hisashi Izumita, Shigekatsu Tetsutani, Yusuke Yamada, Yuta Maruo
  • Publication number: 20230333340
    Abstract: An optical cable according to the present disclosure has a structure in which at least one or more optical fiber cores and an interposition that prevents optical fibers from coming into contact with each other are bundled by a bundle tape.
    Type: Application
    Filed: October 9, 2020
    Publication date: October 19, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuta MARUO, Akira SAKURAI, Yusuke YAMADA, Shigekatsu TETSUTANI, Hiroaki TANIOKA
  • Publication number: 20230314744
    Abstract: An optical fiber cable of the present disclosure is formed by assembling a plurality of drop optical cables, and each of the drop optical cables has a structure where at least one or more optical fiber cores and a tension fiber or a tension member is embedded in a sheath such that the drop optical cable has two or more axes each having a minimum value of a second moment of area with respect to arbitrary neutral planes, and even an optical cable obtained by assembling drop optical cables has a structure having two or more axes each having a minimum value of the second moment of area with respect to arbitrary neutral planes.
    Type: Application
    Filed: July 22, 2020
    Publication date: October 5, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuta MARUO, Hiroaki TANIOKA, Shigekatsu TETSUTANI, Yusuke YAMADA, Akira SAKURAI
  • Publication number: 20230314743
    Abstract: The object of the present disclosure is to provide an optical fiber cable having a large contact area with the bottom surface of a rectangular groove and easily bent in at least two directions, as compared to an optical fiber cable having a circular cross-sectional shape perpendicular to a long axis direction. Therefore, the optical fiber cable of the present disclosure has three or more flat side surfaces in the long axis direction and two or more axes each having a minimum moment of inertia of area with respect to neutral planes.
    Type: Application
    Filed: June 16, 2020
    Publication date: October 5, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuta MARUO, Hiroaki TANIOKA, Shigekatsu TETSUTANI, Yusuke YAMADA, Akira SAKURAI
  • Publication number: 20230273381
    Abstract: An optical fiber cable includes: a sheath; and a core including twisted optical fibers disposed in an accommodation space in the sheath. Each of the twisted optical fibers includes: a glass portion, a primary layer that covers the glass portion, and a secondary layer that covers the primary layer. A fiber pulling force when pulling out the twisted optical fibers is equal to or greater 15 N/10 m. A value of an index Q is less than 20.
    Type: Application
    Filed: August 25, 2021
    Publication date: August 31, 2023
    Applicants: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Soichiro Kaneko, Masatoshi Ohno, Akira Namazue, Ken Osato, Yusuke Yamada, Yuta Maruo, Akira Sakurai, Shigekatsu Tetsutani, Hiroaki Tanioka
  • Publication number: 20230213724
    Abstract: An object is to provide a closure with a structure having a drainage function to eliminate water immersion into a coated optical fiber against temporary flooding and to prevent water from continuously contacting the coated optical fiber. Another object is to provide a closure with improved workability for opening and closing. A closure according to the present invention protects a connection part that connects a coated optical fiber enclosed in a optical fiber cable with a coated optical fiber enclosed in a optical fiber cable. The closure includes a coated optical fiber housing that divides an interior of the closure into a first space that is on a side of a road and has a main body cable insertion hole for inserting the optical fiber cables from an exterior and a second space that is on an opposite side of the road and includes the connection part.
    Type: Application
    Filed: June 1, 2020
    Publication date: July 6, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira SAKURAI, Hiroaki TANIOKA, Hisashi IZUMITA, Shigekatsu TETSUTANI, Yusuke YAMADA, Yuta MARUO
  • Publication number: 20230204896
    Abstract: An object of the present disclosure is to provide a method of laying an optical cable that is capable of laying and removing the optical cable in a stable place without civil engineering works. To achieve the above-mentioned object, a method of laying an optical cable according to the present disclosure includes laying the optical cable and two laying strips on a road surface or a wall surface so that the optical cable is sandwiched between side surfaces of the two laying strips.
    Type: Application
    Filed: June 3, 2020
    Publication date: June 29, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuta MARUO, Hiroaki TANIOKA, Hisashi IZUMITA, Shigekatsu TETSUTANI, Yusuke YAMADA, Akira SAKURAI
  • Publication number: 20230152548
    Abstract: An optical cable includes: twisted optical fiber units each including a fiber group formed by optical fibers. At least one of the optical fiber units includes a filling that wraps an outer circumference of the fiber group.
    Type: Application
    Filed: January 17, 2023
    Publication date: May 18, 2023
    Applicants: FUJIKURA LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masatoshi Ohno, Akira Namazue, Ken Osato, Yusuke Yamada, Yuta Maruo, Akira Sakurai, Shigekatsu Tetsutani, Hiroaki Tanioka
  • Publication number: 20230091454
    Abstract: In an insulating circuit substrate, aluminum sheets formed of aluminum or an aluminum alloy are laminated and bonded to a surface of a ceramic substrate and, in the aluminum sheets, Cu is solid-solubilized at a bonding interface with the ceramic substrate and a ratio B/A between a Cu concentration A mass % at the bonding interface and a Cu concentration B mass % at a position of 100 ?m in a thickness direction from the bonding interface to the aluminum sheets side is 0.30 or more and 0.85 or less.
    Type: Application
    Filed: March 16, 2021
    Publication date: March 23, 2023
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Akira Sakurai, Nobuyuki Terasaki
  • Publication number: 20230073123
    Abstract: A method of laying an optical cable according to the present disclosure includes: installing a laying strip, in which the optical cable is to be embedded, on a road surface or a wall surface; forming a cut line, for embedding the optical cable, on the installed laying strip; and embedding the optical cable in the formed cut line.
    Type: Application
    Filed: March 2, 2020
    Publication date: March 9, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yusuke YAMADA, Akira SAKURAI, Yuta MARUO, Shigekatsu TETSUTANI, Hisashi IZUMITA, Hiroaki TANIOKA
  • Publication number: 20230076354
    Abstract: To surely fix an optical fiber cable including a nonmetallic tension member in a closure without damaging the tension member and a core. An optical fiber cable holding device according to the present disclosure includes: a thin plate portion configured, by bending a rectangular thin plate in a length direction thereof into a shape of a rough circle, to hold an outer periphery of an optical fiber cable; a binding mechanism portion fixed on one end of the thin plate portion and configured to bind and fix the thin plate portion wound around the optical fiber cable; protrusion fitting holes provided on the other end of the thin plate portion wound around the optical fiber cable; and a band-diameter adjuster fixed to the binding mechanism portion, including a protrusion to fittable into each of the protrusion fitting holes, and configured to adjust a diameter of the rough circle by changing from one hole to another hole of the protrusion fitting holes to be fitted onto the protrusion.
    Type: Application
    Filed: February 28, 2020
    Publication date: March 9, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira SAKURAI, Hiroaki TANIOKA, Hisashi IZUMITA, Yusuke YAMADA, Yuta MARUO
  • Publication number: 20190055625
    Abstract: A hot extruded material for a cylindrical sputtering target is provided, in which a purity of copper is in a range of 99.99 mass % to 99.9995 mass %, an Al content is 0.
    Type: Application
    Filed: September 26, 2017
    Publication date: February 21, 2019
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Michiaki Ohto, Satoshi Kumagai, Akira Sakurai
  • Patent number: 9998032
    Abstract: In one form, a method of manufacturing a circuit device comprises providing a lead frame comprising a plurality of leads, each comprising an island portion, a bonding portion elevated from the island portion, a slope portion extending obliquely so as to connect the island portion and the bonding portion, and a lead portion extending from the bonding portion. First and second transistors and first and second diodes are mounted upper surfaces of island portions of respective first and second leads, and are connected to the respective leads through wirings that connect the transistors and diodes to the bonding portions of the respective leads. Lower surfaces of the island portions are attached to an upper surface of a circuit board, and the circuit board, the transistors, the diodes, and the lead frame are encapsulated by a resin, so that the lead portions are not covered by the resin.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 12, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Shigeaki Mashimo, Fumio Horiuchi, Kiyoaki Kudo, Akira Sakurai, Yuhki Inagaki
  • Patent number: 9982335
    Abstract: A manufacturing method of a cylindrical sputtering target material formed of copper or a copper alloy is provided, the method including: a continuous casting step of casting a cylindrical ingot having an average crystal grain diameter equal to or smaller than 20 mm using a continuous casting machine or a semi-continuous casting machine; and a cold working step and a heat treatment step of repeatedly performing cold working and a heat treatment with respect to the cylindrical ingot, to form the cylindrical sputtering target material in which an average crystal grain diameter of an outer peripheral surface is from 10 ?m to 150 ?m and a proportion of the area of crystal grains having a crystal grain diameter more than double the average crystal grain diameter is less than 25% of the entire crystal area.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: May 29, 2018
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Akira Sakurai, Satoshi Kumagai, Takashi Sonohata, Michiaki Ohto
  • Patent number: 9912527
    Abstract: A communication device communicates with a counterpart device via a working path or any of a plurality of backup paths. The communication device includes: a plurality of selection units which select either one of two paths, the plurality of selection units including a main selection unit and an auxiliary selection unit being different from the main selection unit; and a path determination unit which determines a path selected by one of the plurality of selection units which has last performed path selection to be a path to be used for communicating with the counterpart device. The main selection unit selects one path from between the working path and one of the plurality of backup paths. The auxiliary selection unit selects one path from between a path selected by one selection unit of the plurality of selection units and one of the plurality of backup paths, the one selection unit being different from the auxiliary selection unit.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: March 6, 2018
    Assignee: NEC Corporation
    Inventors: Zhenlong Cui, Kazuo Takagi, Akira Sakurai
  • Publication number: 20180006578
    Abstract: In one form, a method of manufacturing a circuit device comprises providing a lead frame comprising a plurality of leads, each comprising an island portion, a bonding portion elevated from the island portion, a slope portion extending obliquely so as to connect the island portion and the bonding portion, and a lead portion extending from the bonding portion. First and second transistors and first and second diodes are mounted upper surfaces of island portions of respective first and second leads, and are connected to the respective leads through wirings that connect the transistors and diodes to the bonding portions of the respective leads. Lower surfaces of the island portions are attached to an upper surface of a circuit board, and the circuit board, the transistors, the diodes, and the lead frame are encapsulated by a resin, so that the lead portions are not covered by the resin.
    Type: Application
    Filed: September 12, 2017
    Publication date: January 4, 2018
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Shigeaki MASHIMO, Fumio HORIUCHI, Kiyoaki KUDO, Akira SAKURAI, Yuhki INAGAKI