Patents by Inventor Koichi Maeda

Koichi Maeda 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: 20220018418
    Abstract: A mounting eye (21) is fastened to a rod by pushing, partially or over an entire periphery, an outer periphery of a joint portion of a mounting eye into an annular groove of the rod. Accordingly, an axial length of a fastening portion can be set shorter than that of a related-art structure (screw fastening), thereby being capable of securing a stroke of the rod of a shock absorber in which the mounting eye is fastened to the rod.
    Type: Application
    Filed: February 14, 2020
    Publication date: January 20, 2022
    Inventors: Masato SUEHIRO, Atsushi MAEDA, Yuji NAKAYAMA, Takashi KOZONO, Koichi YAMAKA
  • Publication number: 20220003921
    Abstract: A multicore fiber includes: n pieces of first core regions in a circular shape with a radius r1 that are arranged about points P11 to P1n, and that has a first core portion and a first cladding portion; a second core region in a circular shape with a radius R1 that is arranged about the point a1, and that has a second core portion and a second cladding portion; and a cladding region that is formed on an outer circumferences of the first core region and the second core region. Further, abutting surfaces that are flat surfaces abutting on each other are formed in portions on the outer circumferences of the first core region and the second core region.
    Type: Application
    Filed: September 20, 2021
    Publication date: January 6, 2022
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masanori TAKAHASHI, Koichi MAEDA, Shinichi ARAI, Ryuichi SUGIZAKI, Masayoshi TSUKAMOTO
  • Publication number: 20220003924
    Abstract: An optical fiber bundle structure includes: plural optical fiber core wires; a crossing preventing member; and a grasping member. Further, the crossing preventing member has slits and the widths of the slits positioned at the respective sides are each equal to or larger than a difference between: a length of one side of a polygon circumscribing the plural optical fiber core wires at a hindmost end portion of the slits at the trailing end; and a length of one side of a polygon circumscribing the plural optical fiber core wires at the leading end.
    Type: Application
    Filed: September 20, 2021
    Publication date: January 6, 2022
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kohei KAWASAKI, Ryuichi SUGIZAKI, Masayoshi TSUKAMOTO, Masanori TAKAHASHI, Shigehiro TAKASAKA, Koichi MAEDA
  • Patent number: 11073656
    Abstract: An aim is to provide an optical coupler that contributes increasing pump-efficiency in an optical amplifier, and the optical amplifier.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: July 27, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Shigehiro Takasaka, Koichi Maeda
  • Publication number: 20200301066
    Abstract: An aim is to provide an optical coupler that contributes increasing pump-efficiency in an optical amplifier, and the optical amplifier.
    Type: Application
    Filed: June 5, 2020
    Publication date: September 24, 2020
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Shigehiro TAKASAKA, Koichi MAEDA
  • Patent number: 10409746
    Abstract: A memory access control device includes: a memory configured to hold data from a host device; and a processor coupled to the memory, the processor: detects an overlapping portion of addresses of data transfer sources of a plurality of memory access requests; merges, in a case where the overlapping portion is detected, read accesses to the data transfer sources for the overlapping portion of the plurality of memory access requests collectively to generate a merged memory access request; executes a data transfer in accordance with the merged memory access request; and instructs writing of data transferred in the data transfer to a plurality of addresses of data transfer destinations of the plurality of memory access requests.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: September 10, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Koichi Maeda
  • Publication number: 20180329841
    Abstract: A memory access control device includes: a memory configured to hold data from a host device; and a processor coupled to the memory, the processor: detects an overlapping portion of addresses of data transfer sources of a plurality of memory access requests; merges, in a case where the overlapping portion is detected, read accesses to the data transfer sources for the overlapping portion of the plurality of memory access requests collectively to generate a merged memory access request; executes a data transfer in accordance with the merged memory access request; and instructs writing of data transferred in the data transfer to a plurality of addresses of data transfer destinations of the plurality of memory access requests.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 15, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Koichi Maeda
  • Patent number: 9722388
    Abstract: A multi-core optical amplifying fiber device includes a plurality of multi-core optical amplifying fibers including a plurality of core portions doped with amplification medium and a cladding portion formed at outer peripheries of the plurality of core portions; and a connection portion connecting the core portions of the plurality of multi-core optical amplifying fibers to one another. The connection portion connects the core portions to restrain deviation, between every connected core portions, of amplification gain for a total length of the core portions connected one another.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: August 1, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masateru Tadakuma, Koichi Maeda, Yukihiro Tsuchida, Shigehiro Takasaka, Ryuichi Sugizaki
  • Patent number: 9692201
    Abstract: A bundle structure is obtained by arranging optical fibers having equal diameters in a close-packed arrangement around the outer circumference of a center optical fiber. The optical fibers are signal light optical fibers that transmit signal lights. The optical fiber is a pump light optical fiber that transmits pump light. The number of optical fibers is equal to the number of cores in the multi-core fiber. The bundle structure and the multi-core fiber are connected to one another by adhering or fusing. The cores and the cores are optically connected, and the core and the cladding are optically connected. When connecting, the mode field diameter of the cores and the cores are substantially equivalent. In addition, the outer diameter (diameter of circumscribed circle including optical fibers) of the bundle structure is set so as not to be greater than the outer diameter of the multi-core fiber.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: June 27, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kengo Watanabe, Tsunetoshi Saito, Yukihiro Tsuchida, Koichi Maeda, Katsunori Imamura
  • Publication number: 20160126680
    Abstract: A terminal unit includes a first terminal having a first connected part, a second terminal, having a second connected part, which is arranged in a lateral direction at intervals relative to the first connected part, a first electronic component arranged between the first connected part and the second connected part, and a terminal holder that holds the first terminal and the second terminal, the terminal holder having a receiving portion for receiving the first electronic component. The first electronic component is such that a different external electrode in the pair of external electrodes is electrically connected to the first connected part and the second connected part by way of electric conductors, and the position of the first electronic component relative to the receiving portion is held by the electric conductors.
    Type: Application
    Filed: October 22, 2015
    Publication date: May 5, 2016
    Inventor: Koichi Maeda
  • Publication number: 20160118762
    Abstract: A multi-core optical amplifying fiber device includes a plurality of multi-core optical amplifying fibers including a plurality of core portions doped with amplification medium and a cladding portion formed at outer peripheries of the plurality of core portions; and a connection portion connecting the core portions of the plurality of multi-core optical amplifying fibers to one another. The connection portion connects the core portions to restrain deviation, between every connected core portions, of amplification gain for a total length of the core portions connected one another.
    Type: Application
    Filed: December 21, 2015
    Publication date: April 28, 2016
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masateru TADAKUMA, Koichi MAEDA, Yukihiro TSUCHIDA, Shigehiro TAKASAKA, Ryuichi SUGIZAKI
  • Publication number: 20160028206
    Abstract: A bundle structure is obtained by arranging optical fibers having equal diameters in a close-packed arrangement around the outer circumference of a center optical fiber. The optical fibers are signal light optical fibers that transmit signal lights. The optical fiber is a pump light optical fiber that transmits pump light. The number of optical fibers is equal to the number of cores in the multi-core fiber. The bundle structure and the multi-core fiber are connected to one another by adhering or fusing. The cores and the cores are optically connected, and the core and the cladding are optically connected. When connecting, the mode field diameter of the cores and the cores are substantially equivalent. In addition, the outer diameter (diameter of circumscribed circle including optical fibers) of the bundle structure is set so as not to be greater than the outer diameter of the multi-core fiber.
    Type: Application
    Filed: August 25, 2015
    Publication date: January 28, 2016
    Inventors: Kengo WATANABE, Tsunetoshi SAITO, Yukihiro TSUCHIDA, Koichi MAEDA, Katsunori IMAMURA
  • Publication number: 20160020573
    Abstract: An optical-fiber-bundle structure is connected to one end of a multi-core fiber. The multi-core fiber has a tapered section formed therein. The outside diameter of the multi-core fiber and the core pitch thereof decrease in the tapered section. It is possible for the multi-core fiber to have an increasing core pitch on the connection-side thereof which connects to the optical-fiber-bundle structure; hence, it is possible to use an easy-to-use large-diameter optical fiber as the optical fiber to be provided in the optical-fiber-bundle structure. When connecting another multi-core fiber to the other end of the multi-core fiber, it is possible to match the outer diameters thereof; hence, when fusion splicing to one another, it is unlikely for a positional shift of the cores to occur.
    Type: Application
    Filed: August 25, 2015
    Publication date: January 21, 2016
    Inventors: Kengo WATANABE, Tsunetoshi SAITO, Yukihiro TSUCHIDA, Koichi MAEDA, Katsunori IMAMURA
  • Patent number: 9225141
    Abstract: A multi-core amplification optical fiber includes a plurality of rare-earth-doped core portions and a cladding portion positioned at an outer periphery of the core portions and having refractive index lower than those of the core portions. When a doping concentration of the rare-earth of each of the core portions is 250 ppm to 2000 ppm, a relative refractive index difference of each of the core portions relative to the cladding portion is 0.5% to 2% at a wavelength of 1550 nm, and a core diameter of each of the core portions is 1 ?m to 5 ?m, a separation distance between each of the core portions and adjacent one of the core portions is set at equal to or larger than 30 ?m and at equal to or smaller than 60 ?m so that a light-crosstalk between the adjacent core portions is equal to or lower than ?30 dB.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: December 29, 2015
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yukihiro Tsuchida, Koichi Maeda, Yu Mimura, Hiroshi Matsuura, Kengo Watanabe, Tsunetoshi Saito, Ryo Miyabe, Shigeto Matsumoto, Keiichi Aiso, Ryuichi Sugizaki
  • Publication number: 20150012774
    Abstract: An information processing apparatus includes a reception unit configured to receive data using a plurality of lanes, a degeneration control unit configured, when a failure occurs in one of the lanes, to degenerate a predetermined number of lanes including a lane in which the failure has occurred and to cause the reception unit to receive the data using remaining lanes except for the predetermined number of the degenerated lanes among the lanes, a retraining unit configured to perform retraining to establish links in the predetermined number of the degenerated lanes, and a return control unit configured, when the links are established in the predetermined number of lanes degenerated by the retraining with the retraining unit, to cause the reception unit to receive the data using the predetermined number of the degenerated lanes and the remaining lanes.
    Type: Application
    Filed: September 23, 2014
    Publication date: January 8, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Koichi MAEDA, Kazumi Hayasaka
  • Patent number: RE45719
    Abstract: This invention provides a surface-coated cutting tool which exhibits excellent fracture resistance and wear resistance in high-speed cutting, such as high-speed gear cutting, high-speed milling, and high-speed drilling. The surface-coated cutting tool includes a hard coating layer composed of an alternately laminated layer structure of at least a thin layer A and a thin layer B formed on the surface of a tool substrate, such as a cemented carbide substrate, a cermet substrate, and a high-speed tool steel substrate. The thin layer A is an (Al, Cr, Si)N layer which satisfies a compositional formula: [AlXCrYSiZ]N (0.2?X?0.45, 0.4?Y?0.75, 0.01?Z?0.2, and X+Y+Z=1 in terms of atomic ratio). The thin layer B is an (Al, Ti, Si)N layer which satisfies a compositional formula: [AlUTiVSiW]N (0.05?U?0.75, 0.15?V?0.94, 0.01?W?0.1, and U+V+W=1 in terms of atomic ratio).
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: October 6, 2015
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Koichi Maeda, Masanori Morikawa, Yuki Matsuoka, Natsuki Ichimiya
  • Patent number: D788189
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: May 30, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata
  • Patent number: D798345
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: September 26, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata
  • Patent number: D800186
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 17, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata
  • Patent number: D800802
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 24, 2017
    Assignee: Mitsubishi Eiectric Corporation
    Inventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata