Patents by Inventor Takashi Kikukawa

Takashi Kikukawa 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: 20210216029
    Abstract: The fixing device includes a cylindrical heated member and a heating part. The cylindrical heated member is long in a width direction of a sheet, and is supported in a rotatable manner with coming into contact with a fixing face of the sheet. The heating part is provided in an inner space of the heated member and heating an inner circumferential face of the heated member. The heating part includes a plurality of heaters disposed side by side in a longitudinal direction of the heated member; and a first temperature sensor measuring a first heater of the plurality of heaters or a heated area of the heated member heated by the first heater. The plurality of heaters and the first temperature sensor are connected in series by a first power supply line.
    Type: Application
    Filed: January 8, 2021
    Publication date: July 15, 2021
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Shunsaku FUJII, Takashi EIKI, Hiroki KAWASAKI, Ryohei TOKUNAGA, Rina KIKUKAWA, Sadanori NAKAE, Kotatsu KAWAGUCHI, Yuta KITABAYASHI, Sara FUJIKAWA, Atsushi KOHAMA, Yuhiro SAKAI
  • Patent number: 11003044
    Abstract: An electro-optic device is provided with a Mach-Zehnder optical waveguide including at least one linear section and at least one curved section and a differential RF signal electrode provided along the Mach-Zehnder optical waveguide. Optical input/output ports of the Mach-Zehnder optical waveguide are provided at one end side in a first direction in which the linear section extends. The differential RF signal electrode is provided in both the linear and curved sections.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: May 11, 2021
    Assignees: TDK CORPORATION, FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Hiroki Hara, Shinji Iwatsuka, Takashi Kikukawa, Toshinori Matsuura, Yasuhiro Ohmori, Masaharu Doi, Shintaro Takeuchi, Yoshinobu Kubota
  • Patent number: 11003043
    Abstract: An optical modulator is provided with a ridge-shaped optical waveguide formed of a dielectric thin film having electro-optic effect, a buffer layer covering the optical waveguide, a signal electrode formed on the buffer layer so as to be opposed to the optical waveguide through the buffer layer; a ground electrode formed on the buffer layer together with the signal electrode, and a dielectric film having a higher dielectric constant than air and covering at least a part of exposed surfaces of the signal electrode and ground electrode and exposed surfaces of the buffer layer.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: May 11, 2021
    Assignee: TDK CORPORATION
    Inventors: Yasuhiro Ohmori, Masaharu Doi, Shintaro Takeuchi, Takehito Tanaka, Yoshinobu Kubota, Shinji Iwatsuka, Kenji Endou, Hiroki Hara, Toshinori Matsuura, Takashi Kikukawa
  • Patent number: 10989980
    Abstract: An optical modulator is provided with a substrate, first and second optical waveguides each formed of a ridge-shaped electro-optic material film and disposed so as to be mutually adjacent on the substrate, a buffer layer covering upper surfaces of the first and second optical waveguides, first and second signal electrodes provided above the buffer layer so as to be opposed respectively to the first and second optical waveguides, and a dielectric layer covering at least one of a part of an exposed surface of the first signal electrode and a part of an exposed surface of the second signal electrode, and a part of an upper surface of the buffer layer. Differential signals are applied to the first and second signal electrodes.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: April 27, 2021
    Assignees: TDK CORPORATION, FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Shinji Iwatsuka, Kenji Endou, Hiroki Hara, Toshinori Matsuura, Takashi Kikukawa, Yasuhiro Ohmori, Masaharu Doi, Shintaro Takeuchi, Takehito Tanaka, Yoshinobu Kubota
  • Patent number: 10948395
    Abstract: What provided is a biosensor including: a substrate having a surface with first and second regions adjacent each other; a magnetoresistance effect element disposed on the first region; a soft magnetic thin film on the second region; a protective film disposed on both the first region and the second region, covering a surface of the soft magnetic thin film, and disposed on the top part of the second region and contains an affinity substance recognizing the biomolecule on the outer surface of the second region exclusively; and an MR cover film disposed on at least the top part of the first region, disposed on the protective film above the magnetoresistance effect element, and being free of the affinity substance, wherein the soft magnetic thin film transmits an in-plane component of a stray magnetic field of magnetic beads to the magnetoresistance effect element.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 16, 2021
    Assignee: TDK CORPORATION
    Inventors: Susumu Haratani, Sachio Tsuboike, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Patent number: 10921522
    Abstract: A first disclosure is an optical fiber member equipped with two holding members that hold an optical fiber such that an end surface of the optical fiber is located on one end and a curving portion having a coat of the optical fiber is curved to be extended at another end; the holding members are provided with holding flat portions that sandwich an end portion of the optical fiber where the coat is removed such that the end surface of the optical fiber is located on the one end; at least any of the holding flat portions has an aligning groove to fix a position of the end portion of the optical fiber; the holding member is provided with a curved surface at a position adjacent to the curving portion in the extending direction D1; and the two holding members are equal in thermal expansion coefficient.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: February 16, 2021
    Assignee: TDK CORPORATION
    Inventors: Hiroki Hara, Masahiro Shinkai, Takashi Kikukawa, Masami Sasaki, Ryohei Fukuzaki, Motohiro Nakahara, Tetsuo Miya, Shuji Tachi, Koichi Arishima
  • Patent number: 10799864
    Abstract: To provide a chemical sensor that enables high detection accuracy. A chemical sensor includes a substrate, two or more magnetoresistance-effect elements disposed side by side in a substrate in-plane direction over the substrate, a first film disposed over a region between the magnetoresistance-effect elements adjacent to each other, and a second film disposed over the magnetoresistance-effect elements, wherein the second film has higher solubility in a specific liquid than the first film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Sachio Tsuboike, Susumu Haratani, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Patent number: 10801993
    Abstract: A chemical sensor that enables high detection accuracy that includes a soft-magnetic-material film, a magnetoresistance-effect element, a first film disposed over the soft-magnetic-material film, and a second film disposed over the magnetoresistance-effect element, wherein, when viewed from a direction perpendicular to the film surface of the soft-magnetic-material film, the soft-magnetic-material film is disposed at least partially so as not to overlap the magnetoresistance-effect element; when viewed from the direction perpendicular to the film surface of the soft-magnetic-material film, the magnetoresistance-effect element is disposed at least partially so as not to overlap the soft-magnetic-material film; and the second film has higher solubility in a specific liquid than the first film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Sachio Tsuboike, Susumu Haratani, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Patent number: 10799863
    Abstract: A chemical sensor that enables high detection accuracy. A chemical sensor includes a substrate, a magnetoresistance-effect element disposed over the substrate, a first film disposed over the magnetoresistance-effect element, and a second film disposed in a region in the vicinity of the magnetoresistance-effect element or over a region in the vicinity of the magnetoresistance-effect element, wherein the second film has higher solubility in a specific liquid than the first film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Sachio Tsuboike, Susumu Haratani, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Publication number: 20200272020
    Abstract: An optical modulator is provided with a ridge-shaped optical waveguide formed of a dielectric thin film having electro-optic effect, a buffer layer covering the optical waveguide, a signal electrode formed on the buffer layer so as to be opposed to the optical waveguide through the buffer layer; a ground electrode formed on the buffer layer together with the signal electrode, and a dielectric film having a higher dielectric constant than air and covering at least a part of exposed surfaces of the signal electrode and ground electrode and exposed surfaces of the buffer layer.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 27, 2020
    Inventors: Yasuhiro OHMORI, Masaharu DOI, Shintaro TAKEUCHI, Takehito TANAKA, Yoshinobu KUBOTA, Shinji IWATSUKA, Kenji ENDOU, Hiroki HARA, Toshinori MATSUURA, Takashi KIKUKAWA
  • Publication number: 20200272021
    Abstract: An electro-optic device is provided with a Mach-Zehnder optical waveguide including at least one linear section and at least one curved section and a differential RF signal electrode provided along the Mach-Zehnder optical waveguide. Optical input/output ports of the Mach-Zehnder optical waveguide are provided at one end side in a first direction in which the linear section extends. The differential RF signal electrode is provided in both the linear and curved sections.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 27, 2020
    Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Hiroki HARA, Shinji IWATSUKA, Takashi KIKUKAWA, Toshinori MATSUURA, Yasuhiro OHMORI, Masaharu DOI, Shintaro TAKEUCHI, Yoshinobu KUBOTA
  • Publication number: 20200271963
    Abstract: An optical modulator is provided with a substrate, first and second optical waveguides each formed of a ridge-shaped electro-optic material film and disposed so as to be mutually adjacent on the substrate, a buffer layer covering upper surfaces of the first and second optical waveguides, first and second signal electrodes provided above the buffer layer so as to be opposed respectively to the first and second optical waveguides, and a dielectric layer covering at least one of a part of an exposed surface of the first signal electrode and a part of an exposed surface of the second signal electrode, and a part of an upper surface of the buffer layer. Differential signals are applied to the first and second signal electrodes.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 27, 2020
    Inventors: Shinji Iwatsuka, Kenji Endou, Hiroki Hara, Toshinori Matsuura, Takashi Kikukawa, Yasuhiro Ohmori, Masaharu Doi, Shintaro Takeuchi, Takehito Tanaka, Yoshinobu Kubota
  • Publication number: 20200049888
    Abstract: A first disclosure is an optical fiber member equipped with two holding members that hold an optical fiber such that an end surface of the optical fiber is located on one end and a curving portion having a coat of the optical fiber is curved to be extended at another end; the holding members are provided with holding flat portions that sandwich an end portion of the optical fiber where the coat is removed such that the end surface of the optical fiber is located on the one end; at least any of the holding flat portions has an aligning groove to fix a position of the end portion of the optical fiber; the holding member is provided with a curved surface at a position adjacent to the curving portion in the extending direction Dl; and the two holding members are equal in thermal expansion coefficient.
    Type: Application
    Filed: February 20, 2018
    Publication date: February 13, 2020
    Inventors: Hiroki HARA, Masahiro SHINKAI, Takashi KIKUKAWA, Masami SASAKI, Ryohei FUKUZAKI, Motohiro NAKAHARA, Tetsuo MIYA, Shuji TACHI, Koichi ARISHIMA
  • Publication number: 20190224671
    Abstract: A biosensor includes a substrate having a surface in which a first region and a second region disposed adjacent to the first region are formed; a magnetoresistance effect element that is disposed on at least the first region and is configured such that a resistance value detected according to an input magnetic field varies; a protective film that is disposed on both the first region and the second region and covers a surface of the magnetoresistance effect element, and is disposed on the top part of the second region and contains an affinity substance that allows recognition of the biomolecules on the outer surface only on the second region; and an adsorption prevention film that is disposed on at least the top part of the first region and is substantially free of the affinity substance, wherein the protective film and the adsorption prevention film are made of different materials.
    Type: Application
    Filed: March 24, 2017
    Publication date: July 25, 2019
    Applicant: TDK CORPORATION
    Inventors: Susumu HARATANI, Sachio TSUBOIKE, Sumiko KITAGAWA, Takashi KIKUKAWA, Haruki YUGA
  • Publication number: 20190154676
    Abstract: A detection system includes a detection device including a space, defined by a wall surface, into which a liquid containing a biomolecular label and a liquid containing magnetic beads are introduced and a magnetic sensor having a surface forming a portion of the wall surface, wherein at least some of the magnetic beads bind to the biomolecular label immobilized on the surface of the magnetic sensor or to a molecule near the biomolecular label immobilized on the surface of the magnetic sensor; and a first magnetic-field applying mechanism that applies a magnetic field in a direction in which the magnetic beads are moved away from the surface of the magnetic sensor.
    Type: Application
    Filed: July 22, 2016
    Publication date: May 23, 2019
    Applicant: TDK CORPORATION
    Inventors: Haruki YUGA, Seigo ZAIMA, Takashi KIKUKAWA, Sachio TSUBOIKE
  • Publication number: 20190128882
    Abstract: What provided is a biosensor including: a substrate having a surface with first and second regions adjacent to each other; a magnetoresistance effect element that is disposed at least on the first region and is configured for a detected resistance value to be changed based on an input magnetic field; a protective film that is disposed on both the first region and the second region, covers a surface of the magnetoresistance effect element, is disposed on the top part of the first region and contains an affinity substance capable of recognizing the biomolecule on the outer surface of the first region exclusively; and an adsorption prevention film that is disposed on at least the top part of the second region and is substantially free of the affinity substance, wherein the protective film and the adsorption prevention film are made of different materials.
    Type: Application
    Filed: March 24, 2017
    Publication date: May 2, 2019
    Applicant: TDK CORPORATION
    Inventors: Susumu HARATANI, Sachio TSUBOIKE, Sumiko KITAGAWA, Takashi KIKUKAWA, Haruki YUGA
  • Publication number: 20190120794
    Abstract: A chemical sensor that enables high detection accuracy that includes a soft-magnetic-material film, a magnetoresistance-effect element, a first film disposed over the soft-magnetic-material film, and a second film disposed over the magnetoresistance-effect element, wherein, when viewed from a direction perpendicular to the film surface of the soft-magnetic-material film, the soft-magnetic-material film is disposed at least partially so as not to overlap the magnetoresistance-effect element; when viewed from the direction perpendicular to the film surface of the soft-magnetic-material film, the magnetoresistance-effect element is disposed at least partially so as not to overlap the soft-magnetic-material film; and the second film has higher solubility in a specific liquid than the first film.
    Type: Application
    Filed: March 24, 2017
    Publication date: April 25, 2019
    Applicant: TDK Corporation
    Inventors: Sachio TSUBOIKE, Susumu HARATANI, Sumiko KITAGAWA, Takashi KIKUKAWA, Haruki YUGA
  • Publication number: 20190113479
    Abstract: To provide a chemical sensor that enables high detection accuracy. A chemical sensor includes a substrate, two or more magnetoresistance-effect elements disposed side by side in a substrate in-plane direction over the substrate, a first film disposed over a region between the magnetoresistance-effect elements adjacent to each other, and a second film disposed over the magnetoresistance-effect elements, wherein the second film has higher solubility in a specific liquid than the first film.
    Type: Application
    Filed: March 24, 2017
    Publication date: April 18, 2019
    Applicant: TDK CORPORATION
    Inventors: Sachio TSUBOIKE, Susumu HARATANI, Sumiko KITAGAWA, Takashi KIKUKAWA, Haruki YUGA
  • Publication number: 20190107512
    Abstract: A chemical sensor that enables high detection accuracy. A chemical sensor includes a substrate, a magnetoresistance-effect element disposed over the substrate, a first film disposed over the magnetoresistance-effect element, and a second film disposed in a region in the vicinity of the magnetoresistance-effect element or over a region in the vicinity of the magnetoresistance-effect element, wherein the second film has higher solubility in a specific liquid than the first film.
    Type: Application
    Filed: March 24, 2017
    Publication date: April 11, 2019
    Applicant: TDK CORPORATION
    Inventors: Sachio TSUBOIKE, Susumu HARATANI, Sumiko KITAGAWA, Takashi KIKUKAWA, Haruki YUGA
  • Publication number: 20190064046
    Abstract: What provided is a biosensor including: a substrate having a surface with first and second regions adjacent each other; a magnetoresistance effect element disposed on the first region; a soft magnetic thin film on the second region; a protective film disposed on both the first region and the second region, covering a surface of the soft magnetic thin film, and disposed on the top part of the second region and contains an affinity substance recognizing the biomolecule on the outer surface of the second region exclusively; and an MR cover film disposed on at least the top part of the first region, disposed on the protective film above the magnetoresistance effect element, and being free of the affinity substance, wherein the soft magnetic thin film transmits an in-plane component of a stray magnetic field of magnetic beads to the magnetoresistance effect element.
    Type: Application
    Filed: March 24, 2017
    Publication date: February 28, 2019
    Applicant: TDK CORPORATION
    Inventors: Susumu HARATANI, Sachio TSUBOIKE, Sumiko KITAGAWA, Takashi KIKUKAWA, Haruki YUGA