Patents by Inventor Tatsuya Nagai

Tatsuya Nagai 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: 12100970
    Abstract: A magnetic coupling coefficient between a power reception coil and a communication antenna is 0.3 or less. A power management circuit suppresses electromagnetic interference between the power reception coil and the communication antenna in a predetermined time period by causing a rectification stopping circuit to operate to keep the rectification stopping circuit in an operation state in the predetermined time period with a received power voltage exceeding a first threshold value and by changing a resonant frequency of a power reception resonant circuit to a frequency different from a frequency being used in a wireless communication circuit to keep the resonant frequency in a changed state.
    Type: Grant
    Filed: April 26, 2023
    Date of Patent: September 24, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Koyo Kaiwa, Tatsuya Hosotani, Takahiro Nagai
  • Patent number: 12086731
    Abstract: In order to assist participants in thinking of an idea by acquiring audio data, it is provided a workshop assistance system, which includes a computer having an arithmetic apparatus configured to execute predetermined processing, a storage device coupled to the arithmetic apparatus, and a communication interface coupled to the arithmetic apparatus, the computer being configured to access solved problem case data including information of solved cases that correspond to problem data, the workshop assistance system comprising: a problem processing module configured to search, by the arithmetic apparatus, solved cases based on problem data that is generated from a discussion among participants; and an idea generation module configured to present, by the arithmetic apparatus, idea data including the generated problem data and information of the solved case found in the search to the participants.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: September 10, 2024
    Assignee: Hitachi, Ltd.
    Inventors: Shuhei Furuya, Yo Takeuchi, Kiyoshi Kumagai, Toshiyuki Ono, Masao Ishiguro, Tatsuya Tokunaga, Chisa Nagai, Takashi Sumiyoshi, Naoyuki Kanda, Kenji Nagamatsu, Kenji Ohya
  • Publication number: 20240295265
    Abstract: A work vehicle includes a hydrostatic continuously variable transmission to output power, an electric motor to perform shifting, a linkage mechanism to link a shifting shaft of the electric motor with a trunnion shaft of the hydrostatic continuously variable transmission the linkage mechanism, including a first linkage section linked with the shifting shaft, and a second linkage section linked with the trunnion shaft, and a biasing mechanism to press and bias a second gear of the second linkage section that meshes with a first gear of the first linkage section against the first gear such that a tooth flank of the second gear abuts with a tooth flank of the first gear in a rotation direction reverse to a rotation direction of the first gear.
    Type: Application
    Filed: May 15, 2024
    Publication date: September 5, 2024
    Inventors: Hiroaki NAGAI, Daisuke NAKAYAMA, Hironobu NOGAMI, Ryo MASUDA, Keiji TAKAHASHI, Tatsuya SAKAI
  • Publication number: 20240290971
    Abstract: A positive electrode composition containing carbon black, carbon nanotubes, an active material, and a binding material, in which the carbon black has a BET specific surface area of 100 to 400 m2/g and a crystallite size (Lc) of 15 to 26 ?, the carbon nanotubes have an average diameter of 5 to 15 nm, and a ratio (average diameter/BET specific surface area) of the average diameter with respect to a BET specific surface area of the carbon nanotubes is 0.01 to 0.068 nm/(m2/g).
    Type: Application
    Filed: June 14, 2022
    Publication date: August 29, 2024
    Applicant: Denka Company Limited
    Inventors: Tatsuya NAGAI, Yuma KITAE, Tetsuya ITO
  • Publication number: 20240250428
    Abstract: A ring-type device includes a wireless power receiver circuit, a radio communication circuit, and a ring-shaped structure. The wireless power receiver circuit includes a power receiver circuit, and a loop coil. The radio communication circuit operates with the loop coil serving as an antenna. The power receiver circuit and the radio communication circuit include an electronic component, and a flexible circuit board to which the electronic component is mounted. The ring-shaped structure has a lateral ring face, a top ring face, and a bottom ring face. The loop coil is disposed along the top ring face. The flexible circuit board is planar in structure in its developed condition, and is disposed in a curved configuration along the lateral ring face of the ring-shaped structure.
    Type: Application
    Filed: February 26, 2024
    Publication date: July 25, 2024
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Takahiro NAGAI, Tatsuya HOSOTANI
  • Patent number: 12040850
    Abstract: A near-field communication device includes a communication antenna for near-field communication formed along a plane, an interface circuit connected to the communication antenna for making a signal of the near-field communication pass through the interface circuit, a wireless communication IC connected to the interface circuit for processing the signal of the near-field communication, a power reception coil arranged along the plane to surround the communication antenna, a resonant capacitor constituting, together with the power reception coil, a power reception resonant circuit, and a rectifying and smoothing circuit connected to the power reception resonant circuit. The power reception resonant circuit resonates at a frequency of the near-field communication, and magnetic flux generated in the vicinity of the power reception coil by a resonant current flowing through the power reception resonant circuit interlinks with the communication antenna.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: July 16, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya Hosotani, Takahiro Nagai
  • Patent number: 12039387
    Abstract: An IC card communicates with a reader/writer, which is induction-type read/write communication equipment, in a contactless manner. A power supply control circuit detects presence or absence of power reception in accordance with an output voltage of a power receiving circuit, detects presence or absence of predetermined communication by using an electronic functional circuit, starts to charge an electrical energy storage device by using a charging circuit when there is not the predetermined communication immediately after power reception is detected, and supplies power from a voltage conversion circuit to the electronic functional circuit without starting to charge the electrical energy storage device by using the charging circuit when there is the predetermined communication immediately after power reception is detected.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: July 16, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takahiro Nagai, Tatsuya Hosotani
  • Patent number: 11926195
    Abstract: A gap formed in a front portion of a door is easily and reliably filled so that occurrence of noise is reduced. A frame front side portion retaining a glass run front side portion being inserted is provided in a front portion of a window frame. A front side of an outer panel is provided with a mirror base to which a mirror base cover is attached. A rear edge of the mirror base is provided with a rear plate portion extending to a cabin inner side. A gap is formed between the frame front side portion and the rear plate portion. An outer sealing plate portion overlapping with a cabin outer side of the mirror base is provided with a gap filling portion extending downward.
    Type: Grant
    Filed: October 22, 2021
    Date of Patent: March 12, 2024
    Assignee: Nishikawa Rubber Co., Ltd.
    Inventors: Haruka Yanoshita, Masaki Motodera, Keizo Matsuoka, Shuhei Nitta, Tatsuya Nagai
  • Publication number: 20240079598
    Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and an iron content that is measured by induced coupled plasma-mass spectrometry is 500 ppb or less.
    Type: Application
    Filed: January 21, 2022
    Publication date: March 7, 2024
    Applicant: Denka Company Limited
    Inventors: Tetsuya ITO, Yusaku HARADA, Kosuke TANAKA, Tatsuya NAGAI
  • Publication number: 20240076502
    Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and a nickel content that is measured by induced coupled plasma-mass spectrometry is 50 ppb or less.
    Type: Application
    Filed: January 21, 2022
    Publication date: March 7, 2024
    Applicant: Denka Company Limited
    Inventors: Tetsuya ITO, Yusaku HARADA, Kosuke TANAKA, Tatsuya NAGAI
  • Publication number: 20240076503
    Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and a cobalt content that is measured by induced coupled plasma-mass spectrometry is 20 ppb or less.
    Type: Application
    Filed: January 21, 2022
    Publication date: March 7, 2024
    Applicant: Denka Company Limited
    Inventors: Tetsuya ITO, Yusaku HARADA, Kosuke TANAKA, Tatsuya NAGAI
  • Patent number: 11658278
    Abstract: To provide a carbon black for batteries capable of readily obtaining a positive electrode for batteries having excellent adhesiveness, and excellent output characteristics and the cycle characteristics. A carbon black for batteries, the carbon black having a BET specific surface area measured according to JIS K6217-2 C method of 100 m2/g or larger, and a surface fluorine concentration X (unit: atom %) and a surface oxygen concentration Y (unit: atom %) measured by X-ray Photoelectron Spectroscopy (XPS) satisfying the following conditions (A) and (B), 0.3?X?4.0 and??(A) 0.1?Y?3.0.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: May 23, 2023
    Assignees: DENKA COMPANY LIMITED, CENTRAL GLASS COMPANY, LIMITED
    Inventors: Shinichiro Osumi, Tatsuya Nagai, Takako Arai, Tetsuya Ito, Hiroyuki Oomori, Shoi Suzuki, Akifumi Yao
  • Patent number: 11637290
    Abstract: A slurry including at least a carbon black and a dispersion medium, wherein a concentration of the carbon black in the slurry is 5% by mass or more and 25% by mass or less, and wherein in a volume-based frequency distribution of particle size of the carbon black measured by a laser diffraction/scattering method, provided that a volume concentration of carbon black with a particle size of 0.6 ?m or more is x (%), a volume concentration of carbon black with a particle size of 0.3 ?m or more and less than 0.6 ?m is y (%), and a volume concentration of carbon black having a particle size of less than 0.3 ?m is 100?(x+y) (%), the slurry satisfies 10?x?70, 30?y?90, and 0?100?(x+y)?30.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: April 25, 2023
    Assignee: DENKA COMPANY LIMITED
    Inventors: Akira Yoda, Tatsuya Nagai, Tetsuya Ito
  • Publication number: 20220200006
    Abstract: A slurry including at least a carbon black and a dispersion medium, wherein a concentration of the carbon black in the slurry is 5% by mass or more and 25% by mass or less, and wherein in a volume-based frequency distribution of particle size of the carbon black measured by a laser diffraction/scattering method, provided that a volume concentration of carbon black with a particle size of 0.6 ?m or more is x (%), a volume concentration of carbon black with a particle size of 0.3 ?m or more and less than 0.6 ?m is y (%), and a volume concentration of carbon black having a particle size of less than 0.3 ?m is 100?(x+y) (%), the slurry satisfies 10?x?70, 30?y?90, and 0?100?(x+y)?30.
    Type: Application
    Filed: April 17, 2020
    Publication date: June 23, 2022
    Inventors: Akira YODA, Tatsuya NAGAI, Tetsuya ITO
  • Publication number: 20220126662
    Abstract: A gap formed in a front portion of a door is easily and reliably filled so that occurrence of noise is reduced. A frame front side portion retaining a glass run front side portion being inserted is provided in a front portion of a window frame. A front side of an outer panel is provided with a mirror base to which a mirror base cover is attached. A rear edge of the mirror base is provided with a rear plate portion extending to a cabin inner side. A gap is formed between the frame front side portion and the rear plate portion. An outer sealing plate portion overlapping with a cabin outer side of the mirror base is provided with a gap filling portion extending downward.
    Type: Application
    Filed: October 22, 2021
    Publication date: April 28, 2022
    Inventors: Haruka YANOSHITA, Masaki Motodera, Keizo Matsuoka, Shuhei Nitta, Tatsuya Nagai
  • Patent number: 11264616
    Abstract: Provided is a conductive composition for electrodes, the conductive composition having excellent electrical conductivity and dispersibility. Also provided are: a positive electrode for non-aqueous batteries, the positive electrode using the conductive composition and having low electrode plate resistance and excellent binding properties; and a non-aqueous battery having high energy density, high output characteristics, and high cycle characteristics. The conductive composition for electrodes contains a conductive material, an active material, a binder, and a dispersant, wherein the conductive material contains carbon black and a multi-walled carbon nanotube having a powder resistivity of 0.035 ?·cm or less as measured under a load of 9.8 MPa, and a median volumetric diameter D50 value, which is as a measure of dispersibility, in the range of 0.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: March 1, 2022
    Assignee: Denka Company Limited
    Inventors: Tatsuya Nagai, Yoko Horikoshi, Hitoshi Kaneko, Hiroshi Yokota
  • Patent number: 11254198
    Abstract: If a sealing member is mounted to a planar sealing member-mount extending from a window frame toward outside of the cabin, separation of a terminal portion of the sealing member from the window frame is to be reduced. A fixing member made of a hard material is provided on a terminal portion of the sealing member in a front-rear direction of a vehicle. The fixing member has a body portion, an engagement portion, and a fixing target portion. The body portion is fixed to the terminal portion of the sealing member. The engagement portion holds the planar sealing member-mount in a thickness direction. The fixing target portion is fixed to a portion of the window frame remote from the planar sealing member-mount in the front-rear direction of the vehicle.
    Type: Grant
    Filed: October 19, 2019
    Date of Patent: February 22, 2022
    Assignees: Nishikawa Rubber Co., Ltd., MAZDA MOTOR CORPORATION
    Inventors: Kazuyuki Takeda, Tatsuya Nagai, Manabu Ikegami, Masahiro Nakashige
  • Publication number: 20220013777
    Abstract: A composition for a positive electrode of a lithium ion secondary battery, the composition comprising: an active material capable of storing and extracting lithium ion; and an electric conductive material, wherein the active material is lithium iron phosphate, wherein the conductive material includes carbon black and carbon nanotube, wherein the carbon black has an average primary particle diameter of 39 nm or less, and wherein the carbon nanotube has an average diameter of 20 nm or less.
    Type: Application
    Filed: November 28, 2019
    Publication date: January 13, 2022
    Applicant: Denka Company Limited
    Inventors: Tatsuya NAGAI, Shinichiro OSUMI, Tetsuya ITO
  • Patent number: 11098201
    Abstract: An object of the present invention is to provide a carbon black for batteries having excellent dispersibility, electron conductivity and oxidation resistance. In addition, an object of the present invention is to provide a low-viscosity conductive composition for an electrode produced using the carbon black, and a low-resistance battery electrode and a battery having excellent high-output characteristics and cycle characteristics produced using the conductive composition. A carbon black for batteries having: BET specific surface area of 50 to 220 m2/g; a crystallite diameter (La) of 30 to 42 ?; and a number of CO2 desorption molecules per unit surface area measured by a temperature-rising desorption gas analysis method (50° C. to 1200° C. of measurement temperature) of 8.0×1016 to 15.0×1016 molecules/m2 is excellent in dispersibility, electron conductivity and oxidation resistance.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: August 24, 2021
    Assignee: DENKA COMPANY LIMITED
    Inventors: Tatsuya Nagai, Shinichiro Osumi, Daiki Ikeda, Tetsuya Ito, Hiroshi Yokota
  • Patent number: 11028209
    Abstract: [Problem] To provide a conductive resin composition for electrodes which is excellent in dispersibility and oxidation resistance. To provide: an electrode composition employing the conductive resin composition for electrodes and having a low viscosity; an electrode employing the electrode composition and having a low electrode plate resistance; and a lithium ion battery having a high energy density, high output characteristics and a high cyclability.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: June 8, 2021
    Assignee: Denka Company Limited
    Inventors: Tatsuya Nagai, Takuya Narutomi, Tetsuya Ito, Hiroshi Yokota