Patents by Inventor Tetsuya Ishikawa

Tetsuya Ishikawa 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: 11360124
    Abstract: A current measuring device (1) includes two triaxial magnetic sensors (11, 12) that are arranged with a prescribed gap between the two triaxial magnetic sensors (11, 12) such that magnetic-sensing directions of the two triaxial magnetic sensors (11, 12) are parallel to each other, and a calculator configured to calculate a current (I) flowing in a measurement-object conductor (MC) based on detection results from the two triaxial magnetic sensors (11, 12) and a gap between the two triaxial magnetic sensors (11, 12).
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: June 14, 2022
    Assignee: Yokogawa Electric Corporation
    Inventors: Kazuma Takenaka, Tetsuya Ishikawa, Minako Terao, Kotaro Ogawa, Saki Kobako
  • Patent number: 11345132
    Abstract: An optical sheet of the present invention includes a specific wavelength absorption layer that contains a polycarbonate as a main material and a light absorbing agent that absorbs light of a specific wavelength out of light in a wavelength range of 350 nm to 740 nm, in which the polycarbonate has a viscosity average molecular weight Mv of 20,000 to 30,000. In addition, the specific wavelength absorption layer further includes an ultraviolet absorbing agent that absorbs light in a wavelength range of 100 nm to 420 nm.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: May 31, 2022
    Assignee: SUMITOMO BAKELITE CO., LTD.
    Inventors: Takuya Oyama, Tetsuya Ishikawa
  • Publication number: 20220155702
    Abstract: The present invention relates to a ferrite particle, containing a crystal phase component containing a perovskite crystal represented by the compositional formula: RZrO3 (provided that R represents an alkaline earth metal element), and having an apparent density in a range represented by the following formula: 1.90?Y?2.45 provided that Y in the formula is the apparent density (g/cm3) of the ferrite particle.
    Type: Application
    Filed: February 20, 2020
    Publication date: May 19, 2022
    Applicant: POWDERTECH CO.,LTD.
    Inventors: Makoto ISHIKAWA, Tetsuya UEMURA
  • Publication number: 20220155701
    Abstract: The present invention provides: a ferrite particle containing a crystal phase component containing a perovskite crystal represented by the compositional formula RZrO3 (where R is an alkaline earth metal element); and an electrophotographic developer carrier core material, an electrophotographic developer carrier, and an electrophotographic developer containing the ferrite particles.
    Type: Application
    Filed: February 20, 2020
    Publication date: May 19, 2022
    Applicant: POWDERTECH CO., LTD.
    Inventors: Makoto ISHIKAWA, Tetsuya UEMURA
  • Publication number: 20220121151
    Abstract: Provided is an image forming apparatus including an image carrier, an exposure device, a developing device that supplies a developer to form a toner image, and a hardware processor that controls the image carrier, the exposure device, and the developing device. The image forming apparatus further includes a fume prevention plate that covers a part of an internal space of the developing device where the developing roller is disposed and the developer is stored and that prevents the developer from scattering outside from the internal space, a suction duct, and an air suction device. One end of the suction duct is connected to the internal space and another end of the suction duct is connected to the air suction device. The fume prevention plate includes a movable portion. A position of the movable portion can be changed between a first position and a second position different from the first position.
    Type: Application
    Filed: October 18, 2021
    Publication date: April 21, 2022
    Inventors: Shota SAKURAI, Kei YUASA, Takenobu KIMURA, Tetsuya ISHIKAWA
  • Patent number: 11271210
    Abstract: A lithium battery cathode material comprises lithium transition metal-based material selected from lithium transition metal oxides and lithium transition metal phosphates, and crystalline silicon carbide residing at grain boundaries of the lithium transition metal-based material, forming conductive pathways along the grain boundaries, the crystalline silicon carbide being less than 10 wt. % of the cathode material.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 8, 2022
    Assignee: Apple Inc.
    Inventors: Mona Shirpour, Tetsuya Ishikawa, Sally S. Lou, Juchuan Li, Shawn William Snyder
  • Patent number: 11264542
    Abstract: A light-emitting device includes a substrate comprising a base member, a first wiring, a second wiring, and a via hole; at least one light-emitting element electrically connected to and disposed on the first wiring; and a covering member having light reflectivity and covering a lateral surface of the light-emitting element and a front surface of the substrate. The base member defines a plurality of depressed portions separated from the via hole in a front view and opening on a back surface and a bottom surface of the base member. The substrate includes a third wiring covering at least one of inner walls of the plurality of depressed portions and electrically connected to the second wiring. A depth of each of the plurality of depressed portions defined from the back surface toward the front surface is larger on a bottom surface side than on an upper surface side of the base member.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: March 1, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tomokazu Maruyama, Tetsuya Ishikawa
  • Patent number: 11227979
    Abstract: A light-emitting device includes a substrate comprising a base member, a first wiring, a second wiring, and a via hole; at least one light-emitting element electrically connected to and disposed on the first wiring; and a covering member having light reflectivity and covering a lateral surface of the light-emitting element and a front surface of the substrate. The base member defines a plurality of depressed portions separated from the via hole in a front view and opening on a back surface and a bottom surface of the base member. The substrate includes a third wiring covering at least one of inner walls of the plurality of depressed portions and electrically connected to the second wiring. A depth of each of the plurality of depressed portions defined from the back surface toward the front surface is larger on a bottom surface side than on an upper surface side of the base member.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: January 18, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tomokazu Maruyama, Tetsuya Ishikawa
  • Patent number: 11215584
    Abstract: A material defect detection device that detects a material defect in a predetermined region of metallic equipment using a magnetic field distribution in the predetermined region measured by a magnetic sensor array including a plurality of magnetic sensors, the material defect detection device including: a processor that calculates a density distribution of magnetic dipoles in the predetermined region based on the magnetic field distribution and calculates a depth distribution of material defect in the predetermined region based on the density distribution of the magnetic dipoles.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: January 4, 2022
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Tetsuya Ishikawa, Hideki Yoshida
  • Publication number: 20210382423
    Abstract: An image recording apparatus includes a stacking portion on which a recording medium is stacked; a recording portion for recording an image on the recording medium; a heating portion for heating the recording medium recorded by the recording portion; a discharge portion for discharging the recording medium recorded by the recording portion; a first path for conveying the recording medium in order of the stacking portion, the recording portion, the heating portion, and the discharge portion; a second path branching off from the first path between the recording portion and the heating portion, and merging with the first path downstream of the heating portion; and a third path for connecting the second path and a part of the first path between the stacking portion and the recording portion, and inverting a recording surface of the recording medium.
    Type: Application
    Filed: June 2, 2021
    Publication date: December 9, 2021
    Inventors: Yumi Mukoyama, Tetsuya Ishikawa, Tsuyoshi Saeki, Yoshiyuki Kurita, Takashi Abe
  • Publication number: 20210379909
    Abstract: An image recording apparatus includes a recording portion that records an image on a recording medium, a heating portion that heats the recording medium on which recording has been performed by the recording portion, a discharge portion that discharges the recording medium on which recording has been performed by the recording portion, a first conveying path for conveying the recording medium from the recording portion to the discharge portion via the heating portion, and a second conveying path for conveying the recording medium from the recording portion to the discharge portion without passing through the heating portion. In a first section in which the heating portion is disposed on the first conveying path, the recording medium is guided in a direction substantially perpendicular to an installation face of the image recording apparatus. The second conveying path has a second section that is parallel to the first section.
    Type: Application
    Filed: June 2, 2021
    Publication date: December 9, 2021
    Inventors: Takashi Abe, Tetsuya Ishikawa, Tsuyoshi Saeki, Yoshiyuki Kurita, Yumi Mukoyama
  • Publication number: 20210382420
    Abstract: An image recording apparatus includes: a first path for conveying a recording medium in order of a stacking portion on which the recording medium is stacked, a recording portion for recording an image on the recording medium, a heating portion for recording the image, and a discharge portion for discharging the recording medium; a second path branching off from the first path at a first branch part between the recording portion and the heating portion, and for discharging the recording medium to the discharge portion without passing through the heating portion; and a third path branching off from the first path at a second branch part between the recording portion and the first branch part, and for conveying the recording medium, the recording surface of which is inverted, toward between the stacking portion and the recording portion in the first path.
    Type: Application
    Filed: June 2, 2021
    Publication date: December 9, 2021
    Inventors: Tsuyoshi Saeki, Tetsuya Ishikawa, Yoshiyuki Kurita, Takashi Abe, Yumi Mukoyama
  • Patent number: 11195977
    Abstract: A light emitting device includes a light emitting element including a first surface; a light guide member covering at least a part of a lateral surface of the light emitting element; a first wavelength conversion member covering the first surface and including a first wavelength conversion particles; and a reflective member being in contact with the light emitting element. The first wavelength conversion member has a thickness of 60 ?m or more and 120 ?m or less. The first wavelength conversion particles have an average particle size of 4 ?m or longer and 12 ?m or smaller; the first wavelength conversion particles have a central particle size of 4 ?m or longer and 12 ?m or smaller. A weight ratio of the first wavelength conversion particles is 60% by weight or more and 75% by weight or less with respect to the total weight of the first wavelength conversion member.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: December 7, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tetsuya Ishikawa
  • Publication number: 20210361520
    Abstract: A massaging apparatus minimizes the application of an excessive load to a massage target area of user's body from a massaging element firmly pressed into contact with the massage target area, provides satisfactory massage treatment, and distributes an excessive load imposed on the massaging element to protect the massaging apparatus itself from damage such as breakage. The massaging apparatus includes a massaging element for performing massage treatment on a massage target area of user's body, and an arm member provided at its head with the massaging element. The arm member has load-reducing mechanism for absorbing a load applied to the arm member from the massaging element. The load-reducing mechanism absorbs a load imposed on the massaging element by exploiting an urgence exerted in a front-rear direction.
    Type: Application
    Filed: May 17, 2019
    Publication date: November 25, 2021
    Applicant: DAITO ELECTRIC MACHINE INDUSTRY COMPANY LIMITED
    Inventors: Koji TAGUCHI, Tetsuya ISHIKAWA, Shinsaku SHIMIZU
  • Publication number: 20210310982
    Abstract: A gas sensor according to the present application includes a detecting device that detects a specific gas concentration of a measurement-object gas based on an electromotive force generated between a reference electrode and a measurement electrode; and a reference gas regulating device that flows an oxygen pumping current between the reference electrode and a measurement-object gas side electrode and pumps oxygen from around the measurement-object gas side electrode to around the reference electrode, wherein when the average value of the oxygen pumping current is P and the limiting current value of a reference gas introduction layer when oxygen is pumped from around the reference electrode to around the measurement-object gas side electrode is Q, the ratio Q/P is from 0.8 to 10.
    Type: Application
    Filed: June 22, 2021
    Publication date: October 7, 2021
    Inventors: Yusuke WATANABE, Tetsuya ISHIKAWA
  • Publication number: 20210305218
    Abstract: A light emitting device includes light emitting elements, light-transmissive members, a covering member, at least one first protrusion, and two second protrusions. The light emitting elements are aligned in a first direction. The light-transmissive members are respectively disposed on upper surfaces of the light emitting elements. The covering member includes at least one first covering portion and two second covering portions. The at least one first covering portion is arranged between adjacent ones of the light-transmissive members, and the second covering portions are arranged at distal ends of the light emitting device in the first direction with the light-transmissive members being arranged between the second covering portions. The at least one first protrusion is arranged on an upper surface of the at least one first covering portion and being spaced apart from the light-transmissive members. The second protrusions respectively arranged on upper surfaces of the second covering portions.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 30, 2021
    Inventors: Tadaaki IKEDA, Yuki KAGEYAMA, Tetsuya ISHIKAWA, Toshifumi IMURA
  • Publication number: 20210292518
    Abstract: To provide a rubber composition that achieves both the energy saving capability and the rolling dimensional stability, to provide a conveyor belt that achieves both the energy saving capability and the rolling dimensional stability, and to provide a belt conveyor having the conveyor belt mounted thereto. A rubber composition containing: a diene polymer (A), and carbon black (B) containing carbon black (b-1) having a nitrogen adsorption specific surface area of more than 100 m2/g and a dibutyl phthalate oil absorption of 100 to 140 mL/100 g, and carbon black (b-2) having a nitrogen adsorption specific surface area of less than 60 m2/g and a dibutyl phthalate oil absorption of 110 mL/100 g or more, a total content of the carbon black (b-1) and the carbon black (b-2) being from 25 to 55 parts by mass per 100 parts by mass of the diene polymer (A).
    Type: Application
    Filed: June 30, 2017
    Publication date: September 23, 2021
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Tetsuya ISHIKAWA
  • Patent number: 11119260
    Abstract: An optical sheet of the present invention is an optical sheet that has flexibility and is used in a curved state of being curved in one direction, and includes a polarized layer 12 that polarizes incident light and a specific wavelength absorption layer provided on a curved concave side from the polarized layer 12 and containing a resin material and a light absorbing agent that absorbs light in a specific wavelength range out of light in a wavelength range of 350 nm to 740 nm. In addition, the resin material is preferably a polycarbonate having a viscosity average molecular weight Mv of 20,000 to 30,000.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: September 14, 2021
    Assignee: SUMITOMO BAKELITE CO., LTD.
    Inventors: Takuya Oyama, Tetsuya Ishikawa
  • Patent number: 11065175
    Abstract: There is provided a leg massager that massages a user's leg by a position-adjustable massaging system for selectively massaging massage target areas of the leg. The leg massager includes: a lower massaging system that massages a massage target area of the user's leg L including at least user's foot F; an upper massaging system that massages an upper massage target area located above the massage target area which is massaged by the lower massaging system; a driving mechanism that drives the upper massaging system and the lower massaging system; and a rockably supporting portion that supports the upper massaging system for rocking motion about its horizontal axis.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 20, 2021
    Assignee: DAITO ELECTRIC MACHINE INDUSTRY COMPANY LIMITED
    Inventors: Tetsuya Ishikawa, Shinsaku Shimizu
  • Patent number: D930857
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: September 14, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tomokazu Maruyama, Tetsuya Ishikawa