Patents by Inventor Takeshi Kawahara

Takeshi Kawahara 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: 11979226
    Abstract: A wavelength cross-connect device performs relay processing, the relay processing being such that wavelength multiplexed signal lights, which are multiband transmitted from a plurality of routes, are demultiplexed into different wavelength bands, and for each route, respective optical signals of the different wavelength bands are amplified, then subject to route change by WSSs and outputted to output side routes M. The device includes C-band WXC units that are the same in total number as the wavelength bands of the optical signals of the respective wavelength bands and perform relay processing on optical signals of a specific wavelength band of the different wavelength bands.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: May 7, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hiroki Kawahara, Takeshi Seki, Sachio Suda, Kohei Saito, Kenta Hirose
  • Patent number: 11581544
    Abstract: An energy storage device includes a current collector (negative electrode current collector), electrode body that includes a body portion and a tab projecting from the body portion, and a leading plate (negative electrode leading plate) that connects the current collector and the tab. In the leading plate, first and second plates and facing each other are continuously connected at end portions thereof in the first plate, the current collector is fixed to a first principal surface on the opposite side to the second plate. In the second plate, the tab is fixed to a second principal surface on the opposite side to the first plate.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: February 14, 2023
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kenji Kawate, Takeshi Kawahara, Tomoko Nishikawa
  • Publication number: 20210336288
    Abstract: An energy storage device includes an electrode body in which an electrode is stacked, a container in which the electrode body is accommodated, a cover plate structure including a cover plate that closes the container, and a spacer that is attached to the electrode body. The spacer includes a positioning unit that positions the cover plate structure. An engaging unit, engaging with the positioning unit, is provided in the cover plate structure.
    Type: Application
    Filed: July 9, 2021
    Publication date: October 28, 2021
    Inventors: Kenji KAWATE, Takao Maki, Takeshi Kawahara
  • Patent number: 11081723
    Abstract: An energy storage device includes: an electrode body including curved portions formed by winding an electrode; a container in which the electrode body is accommodated; and a cover plate structure including a cover plate closing the container. The electrode body is accommodated in the container while one end portion in a winding axis direction of the electrode body faces the cover plate structure. The energy storage device includes spacers (side spacers) that are attached to curved portions, and one end portion of the spacer abuts on a part of the cover plate structure.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: August 3, 2021
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kenji Kawate, Takao Maki, Takeshi Kawahara
  • Patent number: 11079627
    Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: August 3, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masatsugu Masuda, Hideaki Fujii, Takeshi Kawahara, Toshiyuki Tanaka, Kenichi Yoshimura, Makoto Yoshimura, Masataka Miyata, Takehiro Shiomoto
  • Patent number: 10930700
    Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: February 23, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Tatsuki Kasuya, Takeshi Kawahara, Yasuhito Miyazaki, Kentaro Maeta, Hisanori Suzuki
  • Patent number: 10833298
    Abstract: An energy storage device includes an electrode body in which an electrode is wound, a case that stores the electrode body, and spacers (side spacers) interposed between the case and the electrode body. The spacers each have an opening that exposes a portion of faces of curved portions of the electrode body from one end to the other end of the electrode body in a winding axis direction of the electrode body.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: November 10, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kenji Kawate, Takeshi Kawahara, Tomoko Nishikawa
  • Publication number: 20200043974
    Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.
    Type: Application
    Filed: October 9, 2019
    Publication date: February 6, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Tatsuki Kasuya, Takeshi Kawahara, Yasuhito Miyazaki, Kentaro Maeta, Hisanori Suzuki
  • Patent number: 10529772
    Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: January 7, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Tatsuki Kasuya, Takeshi Kawahara, Yasuhito Miyazaki, Kentaro Maeta, Hisanori Suzuki
  • Publication number: 20190235318
    Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.
    Type: Application
    Filed: February 25, 2019
    Publication date: August 1, 2019
    Inventors: MASATSUGU MASUDA, HIDEAKI FUJII, TAKESHI KAWAHARA, TOSHIYUKI TANAKA, KENICHI YOSHIMURA, MAKOTO YOSHIMURA, MASATAKA MIYATA, TAKEHIRO SHIOMOTO
  • Patent number: 10261360
    Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: April 16, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masatsugu Masuda, Hideaki Fujii, Takeshi Kawahara, Toshiyuki Tanaka, Kenichi Yoshimura, Makoto Yoshimura, Masataka Miyata, Takehiro Shiomoto
  • Publication number: 20190035843
    Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.
    Type: Application
    Filed: March 1, 2017
    Publication date: January 31, 2019
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Tatsuki KASUYA, Takeshi KAWAHARA, Yasuhito MIYAZAKI, Kentaro MAETA, Hisanori SUZUKI
  • Publication number: 20180269523
    Abstract: An energy storage device includes: an electrode body including curved portions formed by winding an electrode; a container in which the electrode body is accommodated; and a cover plate structure including a cover plate closing the container. The electrode body is accommodated in the container while one end portion in a winding axis direction of the electrode body faces the cover plate structure. The energy storage device includes spacers (side spacers) that are attached to curved portions, and one end portion of the spacer abuts on a part of the cover plate structure.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 20, 2018
    Inventors: Kenji KAWATE, TaKao MAKI, Takeshi KAWAHARA
  • Publication number: 20180261806
    Abstract: An energy storage device includes an electrode body in which an electrode is wound, a case that stores the electrode body, and spacers (side spacers) interposed between the case and the electrode body. The spacers each have an opening that exposes a portion of faces of curved portions of the electrode body from one end to the other end of the electrode body in a winding axis direction of the electrode body.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 13, 2018
    Inventors: Kenji KAWATE, Takeshi KAWAHARA, Tomoko NISHIKAWA
  • Publication number: 20180261849
    Abstract: An energy storage device includes a current collector (negative electrode current collector), electrode body that includes a body portion and a tab projecting from the body portion, and a leading plate (negative electrode leading plate) that connects the current collector and the tab. In the leading plate, first and second plates and facing each other are continuously connected at end portions thereof. In the first plate, the current collector is fixed to a first principal surface on the opposite side to the second plate. In the second plate, the tab is fixed to a second principal surface on the opposite side to the first plate.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 13, 2018
    Inventors: Kenji KAWATE, Takeshi KAWAHARA, Tomoko NISHIKAWA
  • Publication number: 20170315405
    Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.
    Type: Application
    Filed: October 2, 2015
    Publication date: November 2, 2017
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Masatsugu MASUDA, Hideaki FUJII, Takeshi KAWAHARA, Toshiyuki TANAKA, Kenichi YOSHIMURA, Makoto YOSHIMURA, Masataka MIYATA, Takehiro SHIOMOTO
  • Patent number: 9583742
    Abstract: A battery comprises: a container including a bottom portion, long-sidewall portions each standing on a corresponding one of longer side portions of the bottom portion, short-sidewall portions each standing on a corresponding one of two shorter side portions of the bottom portion, and a welded portion in which portions of a flat plate are mutually welded; an electrode assembly housed in the container; an electrode terminal; and a lid closing the container, the container having a cuboid shape, the bottom portion being rectangular, the long-sidewall portions each being rectangular, the short-sidewall portions each being rectangular, the flat plate being made of metal and being folded, and the portions of the flat plate being mutually abutting or overlapping.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: February 28, 2017
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Noriyoshi Munenaga, Taku Nakamura, Wataru Mashiko, Takeshi Kawahara
  • Patent number: 9064354
    Abstract: An authentication registration/invalidation apparatus is provided, which allows easy invalidation of an authentication tag when the authentication tag is lost, and facilitates management of authentication tags. When an RFID reader (2) receives an RFID signal including an instruction of invalidation, which is transmitted from an operation tag (10b) in a recognition area (A), an invalidation unit (32b) sets an operation mode to an invalidation enabled mode. If an RFID tag recognizer (31a) recognizes an authentication tag (10a) before or after the setting of the invalidation enabled mode, the invalidation unit 32b invalidates the authentication tag (10a), or invalidates all authentication tags (10a) that belong to a group to which the authentication tag belongs.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: June 23, 2015
    Assignee: OPTEX CO., LTD.
    Inventors: Masanao Shiraishi, Mitsugu Mihara, Hiroyuki Ohba, Takeshi Kawahara, Yasuhiro Hosaki, Satoshi Sogabe, Tomoki Kaneyama, Tomoya Masuyama, Kazuo Komiyama
  • Patent number: 9022297
    Abstract: A trigger signal generating device outputs a trigger signal activating an IC tag. The trigger signal generating device includes first and second trigger coils placed at a predetermined separation distance and each having predetermined magnetic field intensity distribution. Each of the first and second trigger coils includes attenuating means for attenuating intensity of a magnetic field generated by the first and second trigger coils to a predetermined level that allows the ID tag to detect trigger IDs of the first and second trigger coils on a side on which the first and second trigger coils are provided, and that does not allow the ID tag to detect the trigger ID of the first trigger coil on an opposite side to the side on which the first and second trigger coils are provided.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: May 5, 2015
    Assignee: Matrix Inc.
    Inventor: Takeshi Kawahara
  • Publication number: 20140346229
    Abstract: A trigger signal generating device outputs a trigger signal activating an IC tag. The trigger signal generating device includes first and second trigger coils placed at a predetermined separation distance and each having predetermined magnetic field intensity distribution. Each of the first and second trigger coils includes attenuating means for attenuating intensity of a magnetic field generated by the first and second trigger coils to a predetermined level that allows the ID tag to detect trigger IDs of the first and second trigger coils on a side on which the first and second trigger coils are provided, and that does not allow the ID tag to detect the trigger ID of the first trigger coil on an opposite side to the side on which the first and second trigger coils are provided.
    Type: Application
    Filed: October 1, 2012
    Publication date: November 27, 2014
    Inventor: Takeshi Kawahara