Patents by Inventor Katsuhisa Taguchi

Katsuhisa Taguchi 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: 10594431
    Abstract: An optical transceiver includes a wavelength-tunable transmission unit configured to transmit an optical transmission signal, a wavelength-tunable reception unit configured to receive an optical reception signal, a wavelength table configured to store a plurality of combinations of a transmission wavelength and a reception wavelength, an input terminal configured to input a wavelength selection signal, and a control unit configured to select one combination of the transmission wavelength and the reception wavelength from the wavelength table based on the wavelength selection signal, and perform transmission wavelength control for setting the selected transmission wavelength in the wavelength-tunable transmission unit as a wavelength of the optical transmission signal and reception wavelength control for setting the selected reception wavelength in the wavelength-tunable reception unit as a wavelength of the optical reception signal.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: March 17, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa Taguchi, Kota Asaka
  • Patent number: 10536237
    Abstract: An optical transceiver includes: a wavelength-tunable transmitter transmitting an optical transmission signal; a wavelength-tunable receiver receiving an optical reception signal; a wavelength table storing a plurality of wavelengths; an input terminal inputs a wavelength selection signal; and a control unit that identifies one of the optical transmission signal and the optical reception signal as a target based on the wavelength selection signal, selects the wavelength from the wavelength table based on the wavelength selection signal, performs transmission wavelength control in which the selected wavelength is set in the wavelength-tunable transmitter as a wavelength of the optical transmission signal in the case that the optical transmission signal is identified as the target, and performs reception wavelength control in which the selected wavelength is set in the wavelength-tunable receiver as a wavelength of the optical reception signal in the case that the optical reception signal is identified as the t
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 14, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa Taguchi, Kota Asaka
  • Publication number: 20190312661
    Abstract: An optical transceiver includes a wavelength-tunable transmission unit configured to transmit an optical transmission signal, a wavelength-tunable reception unit configured to receive an optical reception signal, a wavelength table configured to store a plurality of combinations of a transmission wavelength and a reception wavelength, an input terminal configured to input a wavelength selection signal, and a control unit configured to select one combination of the transmission wavelength and the reception wavelength from the wavelength table based on the wavelength selection signal, and perform transmission wavelength control for setting the selected transmission wavelength in the wavelength-tunable transmission unit as a wavelength of the optical transmission signal and reception wavelength control for setting the selected reception wavelength in the wavelength-tunable reception unit as a wavelength of the optical reception signal.
    Type: Application
    Filed: June 19, 2017
    Publication date: October 10, 2019
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa TAGUCHI, Kota ASAKA
  • Patent number: 10361807
    Abstract: An OLT configures combinations of wavelength pairs used for upstream and downstream signals, in a wavelength multiplexing optical communication system which performs single-core bidirectional transmission of a plurality of upstream and downstream signals, in such a way that the maximum value of the chromatic dispersion delay amount calculated from each wavelength pair is less than the maximum value of the chromatic dispersion delay amounts calculated when the combinations of wavelength pairs used for upstream and downstream signals are both allocated from the short wave side.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: July 23, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa Taguchi, Tomoaki Yoshida, Kota Asaka, Shunji Kimura
  • Publication number: 20190123845
    Abstract: An optical transceiver includes: a wavelength-tunable transmitter transmitting an optical transmission signal; a wavelength-tunable receiver receiving an optical reception signal; a wavelength table storing a plurality of wavelengths; an input terminal inputs a wavelength selection signal; and a control unit that identifies one of the optical transmission signal and the optical reception signal as a target based on the wavelength selection signal, selects the wavelength from the wavelength table based on the wavelength selection signal, performs transmission wavelength control in which the selected wavelength is set in the wavelength-tunable transmitter as a wavelength of the optical transmission signal in the case that the optical transmission signal is identified as the target, and performs reception wavelength control in which the selected wavelength is set in the wavelength-tunable receiver as a wavelength of the optical reception signal in the case that the optical reception signal is identified as the t
    Type: Application
    Filed: June 19, 2017
    Publication date: April 25, 2019
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa TAGUCHI, Kota ASAKA
  • Patent number: 10250331
    Abstract: A subscriber device includes a demultiplexer configured to demultiplex input wavelength-multiplexed light into a plurality of light signals for each wavelength, a plurality of light receivers configured to receive each of the plurality of light signals obtained through demultiplexing by the demultiplexer and to convert the light signals into electrical signals, a plurality of limiting amplifiers configured to amplify each of the plurality of electrical signals output from the plurality of light receivers, and a plurality of signal selection units configured to select a plurality of signals to be received from among a plurality of amplified signals output from the plurality of limiting amplifiers.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: April 2, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa Taguchi, Kota Asaka
  • Publication number: 20180351685
    Abstract: An OLT configures combinations of wavelength pairs used for upstream and downstream signals, in a wavelength multiplexing optical communication system which performs single-core bidirectional transmission of a plurality of upstream and downstream signals, in such a way that the maximum value of the chromatic dispersion delay amount calculated from each wavelength pair is less than the maximum value of the chromatic dispersion delay amounts calculated when the combinations of wavelength pairs used for upstream and downstream signals are both allocated from the short wave side.
    Type: Application
    Filed: January 6, 2016
    Publication date: December 6, 2018
    Inventors: Katsuhisa Taguchi, Tomoaki Yoshida, Kota Asaka, Shunji Kimura
  • Publication number: 20180145758
    Abstract: A subscriber device includes a demultiplexer configured to demultiplex input wavelength-multiplexed light into a plurality of light signals for each wavelength, a plurality of light receivers configured to receive each of the plurality of light signals obtained through demultiplexing by the demultiplexer and to convert the light signals into electrical signals, a plurality of limiting amplifiers configured to amplify each of the plurality of electrical signals output from the plurality of light receivers, and a plurality of signal selection units configured to select a plurality of signals to be received from among a plurality of amplified signals output from the plurality of limiting amplifiers.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 24, 2018
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa TAGUCHI, Kota ASAKA
  • Patent number: 9923637
    Abstract: A bias point of an external modulator is set to different values according to on and off of a burst control signal and an optical source is driven continuously in a burst optical signal transmission device. The burst optical signal transmission device avoid generation of transient fluctuation of a wavelength and a light amount at the time of burst signal rising.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: March 20, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kota Asaka, Katsuhisa Taguchi, Hirotaka Nakamura
  • Patent number: 9912116
    Abstract: A burst optical signal transmission device which includes a light source for generating and outputting burst signal light, a light source driving circuit for outputting, to the light source, a driving signal for switching between an output time and a stop time of the burst signal light, based on a burst control signal, and a pre-emphasis circuit for outputting a pre-emphasis control signal for superimposing an additional signal for charging a capacitor included in the light source, onto the driving signal, at a timing in the vicinity of the beginning of the burst control signal.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: March 6, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kota Asaka, Katsuhisa Taguchi
  • Publication number: 20170237232
    Abstract: A burst optical signal transmission device which includes a light source for generating and outputting burst signal light, a light source driving circuit for outputting, to the light source, a driving signal for switching between an output time and a stop time of the burst signal light, based on a burst control signal, and a pre-emphasis circuit for outputting a pre-emphasis control signal for superimposing an additional signal for charging a capacitor included in the light source, onto the driving signal, at a timing in the vicinity of the beginning of the burst control signal.
    Type: Application
    Filed: October 26, 2015
    Publication date: August 17, 2017
    Inventors: Kota ASAKA, Katsuhisa TAGUCHI
  • Publication number: 20160127045
    Abstract: A bias point of an external modulator is set to different values according to on and off of a burst control signal and an optical source is driven continuously in a burst optical signal transmission device. The burst optical signal transmission device avoid generation of transient fluctuation of a wavelength and a light amount at the time of burst signal rising.
    Type: Application
    Filed: June 24, 2014
    Publication date: May 5, 2016
    Inventors: Kota ASAKA, Katsuhisa TAGUCHI, Hirotaka NAKAMURA
  • Patent number: 7971304
    Abstract: An optical fiber connector cleaner (1) comprises a housing (10), a winding means (32) and a delivery means (34) for a cleaning tape (T) which are disposed in the housing, a cleaning means (20) having a bar-like cleaning section (21) projecting outwardly of the housing, on the front-end of the cleaning section the cleaning tape delivered from the delivery means being movably mounted under tension in an exposed state, the front-end of the cleaning section being brought into contact with the end surface of an optical fiber connector to thereby clean the end surface, a cleaning section rotating means (23) coaxially connected to the cleaning section in the housing and rotatably supported with respect to the housing; and a transmission means (40) which rotates the winding means and the cleaning section rotating means substantially simultaneously in a predetermined direction through a predetermined angle and then reverses the cleaning section rotating means to its original position.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: July 5, 2011
    Assignee: Seikoh Giken Co., Ltd.
    Inventors: Takahisa Kida, Katsuhisa Taguchi
  • Patent number: 7540427
    Abstract: The present invention provides an IC tag which has a structure comprising a first adhesive layer formed on a surface of a substrate sheet, an electronic circuit and an IC chip connecting both ends of the electronic circuit, both formed on the surface of the first adhesive layer, and a second adhesive layer covering the electronic circuit and the IC chip. The IC tag further includes a release agent layer formed at positions corresponding to the both ends of the electronic circuit and located at the interface between the substrate sheet and the first adhesive layer. When the IC tag attached to an article is peeled off, the built-in electronic circuit is surely broken.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: June 2, 2009
    Assignee: Lintec Corporation
    Inventors: Masateru Yamakage, Katsuhisa Taguchi, Tomoyuki Hasegawa, Toru Takahara
  • Publication number: 20070023067
    Abstract: An optical fiber connector cleaner (1) comprises a housing (10), a winding means (32) and a delivery means (34) for a cleaning tape (T) which are disposed in the housing, a cleaning means (20) having a bar-like cleaning section (21) projecting outwardly of the housing, on the front-end of the cleaning section the cleaning tape delivered from the delivery means being movably mounted under tension in an exposed state, the front-end of the cleaning section being brought into contact with the end surface of an optical fiber connector to thereby clean the end surface, a cleaning section rotating means (23) coaxially connected to the cleaning section in the housing and rotatably supported with respect to the housing; and a transmission means (40) which rotates the winding means and the cleaning section rotating means substantially simultaneously in a predetermined direction through a predetermined angle and then reverses the cleaning section rotating means to its original position.
    Type: Application
    Filed: July 9, 2004
    Publication date: February 1, 2007
    Applicant: Seikoh Giken Co., Ltd.
    Inventors: Takahisa Kida, Katsuhisa Taguchi
  • Publication number: 20060273179
    Abstract: The present invention provides an IC tag which has a structure comprising a first adhesive layer formed on a surface of a substrate sheet, an electronic circuit and an IC chip connecting both ends of the electronic circuit, both formed on the surface of the first adhesive layer, and a second adhesive layer covering the electronic circuit and the IC chip. The IC tag further includes a release agent layer formed at positions corresponding to the both ends of the electronic circuit and located at the interface between the substrate sheet and the first adhesive layer. When the IC tag attached to an article is peeled off, the built-in electronic circuit is surely broken.
    Type: Application
    Filed: May 14, 2003
    Publication date: December 7, 2006
    Inventors: Masateru Yamakage, Katsuhisa Taguchi, Tomoyuki Hasegawa, Toru Takahara
  • Patent number: 6718223
    Abstract: A method of processing a semiconductor wafer. The wafer is secured to a wafer supporting member having a data carrier. Information required for working the semiconductor wafer is input to the data carrier. The wafer is then worked according to information read from the data carrier. The data carrier is configured to permit operations such as back grinding, dicing and pickup of the wafer, and prevents wafer breakage when the wafer is carried between different operations.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: April 6, 2004
    Assignee: Lintec Corporation
    Inventors: Yuichi Iwakata, Hayato Noguchi, Katsuhisa Taguchi, Kazuyoshi Ebe
  • Patent number: 6592973
    Abstract: A card sealed by using a composition which includes an acrylate compound polymerizable by an ionizing radiation and 1 to 40 parts by weight of a polyfunctional isocyanate compound per 100 parts by weight of the acrylate compound and can be cured by irradiation of the ionizing radiation and a process for producing a card disposing a coating layer of the composition between a substrate sheet and a cover sheet and curing the coating layer by irradiation of an ionizing radiation.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: July 15, 2003
    Assignee: Lintec Corporation
    Inventors: Yasukazu Nakata, Akira Ichikawa, Katsuhisa Taguchi, Yuichi Iwakata
  • Publication number: 20010011575
    Abstract: A process for producing an IC chip having a protective layer is provided. The process comprises attaching an adhesive sheet comprising a base material and a layer of a curable resin disposed on one face of the base material to at least one face of an IC chip attached to a circuit substrate under pressure in a manner such that the layer of a curable resin contacts the face of the IC chip and curing the layer of a curable resin.
    Type: Application
    Filed: December 27, 2000
    Publication date: August 9, 2001
    Inventors: Yasukazu Nakata, Katsuhisa Taguchi, Toru Takahara
  • Patent number: 6171672
    Abstract: A cover tape for chip transportation stuck to a surface of a carrier tape which has parts for accommodating chips formed intermittently in its lengthwise direction, to thereby seal the chip accommodating parts, wherein said cover tape comprises a tape-shaped substrate and pressure sensitive adhesive parts superimposed on one side of the tape-shaped substrate so that the pressure sensitive adhesive parts do not face the chip accommodating parts, the above pressure sensitive adhesive parts comprising a silicone pressure sensitive adhesive and a crosslinking agent (C) capable of crosslinking therewith, the above silicone pressure sensitive adhesive comprising: (A) a silicone resin component and (B) a silicone rubber component which contains a phenyl group. This cover tape for chip transportation enables avoiding a lifting/separation of cover tape from carrier tape caused by a difference in thermal shrinkage ratio when a polystyrene carrier tape is used.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: January 9, 2001
    Assignee: Lintec Corp.
    Inventors: Hiroshi Koike, Katsuhisa Taguchi, Kazuyoshi Ebe