Patents by Inventor Toshikazu Hashimoto

Toshikazu Hashimoto 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: 20190263769
    Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.
    Type: Application
    Filed: May 10, 2019
    Publication date: August 29, 2019
    Applicant: Sumitomo Dainippon Pharma Co., Ltd.
    Inventors: Toshikazu YAGI, Satoshi SUZUKI, Hiroto TATAMIDANI, Kazuki HASHIMOTO
  • Patent number: 10355395
    Abstract: A wire with terminal (1) includes a single-core wire (3), a connector terminal (2) and a seal (5). The wire (3) includes one conductor (31) and an insulation coating layer (32) covering the conductor (31). The wire (3) is formed with a conductor portion (310) that is part of the conductor (31) projecting from an end of the insulation coating layer (32). The connector terminal (2) is connected to the conductor portion (310) and arranged in an insertion hole (71) in a case (7). The seal (5) is mounted on an outer periphery of the conductor portion (310) and in the insertion hole (71) and closes a clearance (S1) between the inner periphery of the seal (5) and the outer periphery of the conductor portion (310) and a clearance (S2) between the outer periphery of the sealing member (5) and the inner periphery of the insertion hole (71).
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: July 16, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Tsutomu Hashimoto, Hiroki Hirai, Kosuke Sone, Toshikazu Saba, Yasuto Takeda
  • Patent number: 10329267
    Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: June 25, 2019
    Assignee: SUMITOMO DAINIPPON PHARMA CO., LTD.
    Inventors: Toshikazu Yagi, Satoshi Suzuki, Hiroto Tatamidani, Kazuki Hashimoto
  • Publication number: 20190056552
    Abstract: Provided is an optical multiplexing circuit including: a first optical waveguide inputting a first light beam; a second optical waveguide inputting second and third light beams; an MM conversion waveguide; a first coupling part converting the first light beam into a higher order mode to couple the first light beam to the MM conversion waveguide; and a second coupling part converting the first light beam propagating through the MM conversion waveguide into the 0-th order mode to couple the first light beam to the second optical waveguide to transmit the second and third light beams.
    Type: Application
    Filed: February 17, 2017
    Publication date: February 21, 2019
    Inventors: Junji Sakamoto, Kei Watanabe, Toshikazu Hashimoto
  • Publication number: 20170171198
    Abstract: A communication system includes: a server apparatus; and a terminal apparatus that becomes capable of accessing the server apparatus through authentication based on information for identifying a user, wherein upon receiving an input of first identification information after the authentication, the terminal apparatus sends the first identification information to the server apparatus via a first communication line, the server apparatus receives second identification information sent from an electronic apparatus via a second communication line, the second identification information being unique to the electronic apparatus, upon receiving the first identification information and the second identification information, the server apparatus determines whether the first identification information matches part of the second identification information, and if the first identification information matches the part of the second identification information, the server apparatus registers the electronic apparatus in associa
    Type: Application
    Filed: January 20, 2015
    Publication date: June 15, 2017
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yuhsuke YAMADA, Misuzu KAWAMURA, Masaru TAKEUCHI, Akira FUJIWARA, Toshikazu HASHIMOTO
  • Publication number: 20160052201
    Abstract: A method for producing a decorative lens capable of effectively suppressing deformation of the lens in laminating a film material to the lens even when lenses vary widely in shape, in which support jigs or the like for suppressing deformation of lenses need not be provided for respective lenses having different shapes. A first compartment and a second compartment are separated hermetically by a film material, the second compartment and a third compartment are hermetically separated by an elastic film, the pressure inside the first compartment 31 is made higher than the pressure inside the second compartment, and in laminating the film material is to a lens disposed inside the second compartment, the pressure inside the third compartment is made higher than the pressure inside the second compartment, so that the lens is supported by the elastic film.
    Type: Application
    Filed: April 1, 2013
    Publication date: February 25, 2016
    Applicant: HOYA CORPORATION
    Inventor: Toshikazu HASHIMOTO
  • Publication number: 20150358792
    Abstract: A wireless communication system with increased convenience of pairing is provided. A hard disk of a management server forming the wireless communication system includes a database having pairing information. The database includes pairing information and terminal device user information. The pairing information includes a terminal ID and a device ID. The terminal device user information includes a terminal ID or device ID, and a common ID. A terminal ID of a first terminal, a terminal ID of a second terminal, a device ID of a first device, and a device ID of a second device are associated with one another via a common ID. The common ID is a value defined in a filed of the common ID of the terminal device user information.
    Type: Application
    Filed: March 7, 2014
    Publication date: December 10, 2015
    Inventors: Toshikazu HASHIMOTO, Taichiro MORISHITA, Koji KAWADA
  • Patent number: 8971677
    Abstract: An optical 90-degree hybrid circuit includes: first and second optical splitters for receiving and splitting a first and second light beam into two, respectively; a first optical coupler for generating an interfering light beam by multiplexing one of the light beams split by the first optical splitter and the second optical splitter; and a second optical coupler for generating an interfering light beam by multiplexing another one of the light beams split by the first optical splitter and the second optical splitter. The first optical splitter includes an optical coupler configured to output two light beams having equal phases, and the second optical splitter includes an optical coupler configured to output two light beams having a phase difference of 90 degrees.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: March 3, 2015
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yohei Sakamaki, Toshikazu Hashimoto, Yusuke Nasu, Kuninori Hattori, Hiroshi Takahashi
  • Patent number: 8737779
    Abstract: An optical wavelength multi/demultiplexer having transmission characteristics with a higher rectangular degree than a conventional one includes an AWG and two-stage lattice circuit. An example of a two-stage lattice circuit according to the present invention includes an input waveguide, a third optical coupler, a third and fourth arm waveguides, a second optical coupler, a first and second arm waveguides, a first optical coupler, and output waveguides. The optical path length differences between the third and fourth arm waveguides and between the first and second arm waveguides are designed to be ?L. The path passing the third and first arm waveguides differs by 2·?L in optical length from that the fourth and second arm waveguides. The paths passing the third and second arm waveguides and passing the fourth and first arm waveguides differ by ?L from that passing the fourth and second arm waveguides.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: May 27, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Tsutomu Kitoh, Shin Kamei, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi, Manabu Oguma
  • Patent number: 8649640
    Abstract: The present invention provides an optical 90-degree hybrid circuit for reducing wavelength dependency of an IQ phase difference. An optical 90-degree hybrid circuit according to the present invention comprises a first demultiplexing optical coupler including a first and second input port, a second demultiplexing optical coupler including a third and fourth input port, first and second arm waveguides connected to the first and second input port, each having the same length, a third and fourth arm waveguides connected to the third and fourth input port, each having the same length, a 90-degree phase shift section installed in one of the first to fourth arm waveguides, a first optical coupler connected to the first and third arm waveguide, and a second optical coupler connected to the second and fourth arm waveguide, the light is inputted into the first and fourth input port or into the second and third input port.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: February 11, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yohei Sakamaki, Yusuke Nasu, Toshikazu Hashimoto, Kuninori Hattori, Hiroshi Takahashi
  • Patent number: 8588560
    Abstract: An optical 90-degree hybrid circuit includes a first demultiplexing optical coupler having two or more first input ports and two or more first output ports, a second demultiplexing optical coupler having two or more second input ports and two or more second output ports, two first arm waveguides connected to the first output ports, two second arm waveguides connected to the second output ports, a 90-degree phase shift section installed in one of the four arm waveguides, a first optical coupler and a second optical coupler connected to the first arm waveguides and the second arm waveguides, a first optical waveguide for connecting an optical splitter and the first input ports, and a second optical waveguide for connecting the optical splitter and the second input ports, wherein an optical length of the first optical waveguide is different from that of the second optical waveguide.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: November 19, 2013
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yohei Sakamaki, Takashi Goh, Toshikazu Hashimoto, Yusuke Nasu, Kuninori Hattori, Hiroshi Takahashi
  • Patent number: 8554040
    Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: October 8, 2013
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
  • Patent number: 8538222
    Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: September 17, 2013
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
  • Patent number: 8483525
    Abstract: When a conventional synchronized AWG is employed to extend a transmission passband, an increase in loss near the optical center frequency can not be avoided. Because of passband width limit, a problem has existed in that the synchronized AWG could not be applied for a large, complicated communication system wherein a signal light passes a number of points. Therefore, an optical wavelength multiplexing/demultiplexing circuit of the present invention is a synchronized AWG, which includes an optical splitter arranged in an interference circuit that is connected on the side of one slab waveguide. The splitting ratio of the optical splitter varies, depending on the optical frequency, and the value becomes minimum near the optical center frequency of the synchronized AWG. The optical splitter is operated so that the splitting ratio is comparatively great at optical frequencies distant from the optical center frequency.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: July 9, 2013
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Tsutomu Kitoh, Shin Kamei, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi, Manabu Oguma
  • Patent number: 8463097
    Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: June 11, 2013
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
  • Publication number: 20130142948
    Abstract: A photochromic lens manufacturing system has an orderer side computer (101) and a manufacturer side computer (201) connected with each other through a communication line (300), and is adapted to manufacture a photochromic lens with an optical surface forming device (204), a photochromic film forming device (202) and a hard film forming device (204) under control of the manufacturer side computer (201). The orderer side computer (101) transmits lens substrate data related to a substrate material of the lens, optical surface data related to optical surfaces of the lens, data related to the photochromic film and data related to a hard film to the manufacturer side computer (201) through the communication line (300).
    Type: Application
    Filed: March 31, 2010
    Publication date: June 6, 2013
    Applicant: HOYA CORPORATION
    Inventors: Hiroshi Ohta, Takeshi Imizu, Takamitsu Hirose, Toshikazu Hashimoto
  • Publication number: 20120311516
    Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.
    Type: Application
    Filed: July 25, 2012
    Publication date: December 6, 2012
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
  • Publication number: 20120304143
    Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.
    Type: Application
    Filed: July 25, 2012
    Publication date: November 29, 2012
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
  • Publication number: 20120170891
    Abstract: An optical wavelength multi/demultiplexer having transmission characteristics with a higher rectangular degree than a conventional one includes an AWG and two-stage lattice circuit. An example of a two-stage lattice circuit according to the present invention includes an input waveguide, a third optical coupler, a third and fourth arm waveguides, a second optical coupler, a first and second arm waveguides, a first optical coupler, and output waveguides. The optical path length differences between the third and fourth arm waveguides and between the first and second arm waveguides are designed to be ?L. The path passing the third and first arm waveguides differs by 2·?L in optical length from that the fourth and second arm waveguides. The paths passing the third and second arm waveguides and passing the fourth and first arm waveguides differ by ?L from that passing the fourth and second arm waveguides.
    Type: Application
    Filed: August 25, 2010
    Publication date: July 5, 2012
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tsutomu Kitoh, Shin Kamei, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi, Manabu Oguma
  • Publication number: 20120141067
    Abstract: The present invention provides an optical 90-degree hybrid circuit for reducing wavelength dependency of an IQ phase difference. An optical 90-degree hybrid circuit according to the present invention comprises a first demultiplexing optical coupler including a first and second input port, a second demultiplexing optical coupler including a third and fourth input port, first and second arm waveguides connected to the first and second input port, each having the same length, a third and fourth arm waveguides connected to the third and fourth input port, each having the same length, a 90-degree phase shift section installed in one of the first to fourth arm waveguides, a first optical coupler connected to the first and third arm waveguide, and a second optical coupler connected to the second and fourth arm waveguide, the light is inputted into the first and fourth input port or into the second and third input port.
    Type: Application
    Filed: July 22, 2010
    Publication date: June 7, 2012
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yohei Sakamaki, Yusuke Nasu, Toshikazu Hashimoto, Kuninori Hattori, Hiroshi Takahashi