Patents by Inventor Kohei Fujii

Kohei Fujii 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: 20250172373
    Abstract: An initiator includes a pair of electrodes, an insulating member interposed between the pair of electrodes, a cover body covering one end side of the pair of electrodes together with a space around the pair of electrodes, and an explosive with which the space inside the cover body is filled. The pair of electrodes include, in the space, a discharge gap where a dielectric strength is lower than a dielectric strength of a portion where the insulating member is interposed. In this way, provided is a technology that enables ignition without a bridge wire and facilitates manufacture of an initiator.
    Type: Application
    Filed: February 20, 2023
    Publication date: May 29, 2025
    Applicant: Daicel Corporation
    Inventors: Jackkrit SABMEK, Shougo KOMORI, Kohei FUJII
  • Publication number: 20240429873
    Abstract: Various aspects of integrated amplifiers, layouts for the integrated amplifiers, and packaged arrangements of the amplifiers are described. An example integrated amplifier includes an amplifier cell and a stability capacitor. The amplifier cell includes a common source transistor and a common gate transistor in a cascode arrangement. The common gate transistor includes a plurality of contacts. The stability capacitor is coupled between an output for the integrated amplifier and a gate of the common gate transistor. The stability capacitor is formed among the plurality of contacts of the common gate transistor over the semiconductor die. In one example, the stability capacitor includes a plurality of stability capacitors distributed among the plurality of contacts of the common gate transistor. The stability capacitor can also be distributed along an interconnect feed finger that extends between the contacts of the common gate transistor.
    Type: Application
    Filed: September 4, 2024
    Publication date: December 26, 2024
    Inventors: Wayne Mack Struble, Shamit Som, Kohei Fujii, Walter Nagy
  • Patent number: 12113484
    Abstract: Various aspects of integrated amplifiers, layouts for the integrated amplifiers, and packaged arrangements of the amplifiers are described. In one example, an amplifier includes an amplifier cell, and a biasing network coupled to the common gate transistor in the amplifier cell. The amplifier cell includes a common source transistor and a common gate transistor in a cascode arrangement, where at least one of the common source transistor and the common gate transistor comprises a field plate. Among other advantages, the amplifiers described herein can be biased with relatively high voltages and still operate like a single a common source transistor, without sacrificing reliability, performance, or requiring additional off-chip components, such as biasing networks of resistors and inductors.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: October 8, 2024
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventors: Wayne Mack Struble, Shamit Som, Kohei Fujii, Walter Nagy
  • Publication number: 20240325980
    Abstract: The present invention relates to a hollow fiber membrane module unit including a plurality of hollow fiber membrane elements to which header pipe caps are attached at both end portions, the hollow fiber membrane elements being arranged in parallel to form a row, in which the adjacent header pipe caps attached to the hollow fiber membrane elements on a permeate side are connected by a side seal connection covering an outer periphery of a contact surface, and the header pipe caps at at least both ends of the row are fixed by a support bar.
    Type: Application
    Filed: August 18, 2022
    Publication date: October 3, 2024
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Naoki NAKASHIMA, Michitaka HIGAKI, Ryo ICHIMURA, Kohei FUJII
  • Publication number: 20240128939
    Abstract: A symmetrical common gate direct current bias network for stacked field effect transmitter distributed high-power amplifier, related apparatus, and related method are provided. An apparatus includes a plurality of amplifier stages connected in parallel between an input port and an output port. The apparatus can also include a first common gate voltage generator operatively connected at a first side of the plurality of amplifier stages and a second common gate voltage generator operatively connected at a second side of the plurality of amplifier stages. The first common gate voltage generator can be operatively connected to the second common gate voltage generator in a symmetrical configuration.
    Type: Application
    Filed: October 18, 2022
    Publication date: April 18, 2024
    Inventor: Kohei Fujii
  • Patent number: 11826094
    Abstract: A method of producing a catheter includes a step of arranging a lead wire in the lumen of a thermoplastic outer-layer tube such that the lead wire extends in the longitudinal direction of the outer-layer tube; a step of exposing one end of the lead wire out of an opening of the outer-layer tube; a step of joining the one end of the lead wire exposed out of the opening with the inner wall of a ring electrode; a step of covering the opening of the outer-layer tube with the ring electrode; an step of inserting a thermoplastic inner-layer tube in the lumen of the outer-layer tube; and an integrating step of heating the outer-layer tube and the inner-layer tube to integrate the outer-layer and the inner-layer tubes to form an electrode tip such that the lead wire is interlaminarly embedded and fixed between the outer-layer and the inner-layer tubes.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: November 28, 2023
    Assignee: Toray Industries, Inc.
    Inventors: Yumi Oka, Kohei Fujii, Kota Tsukamoto
  • Publication number: 20230141641
    Abstract: A balloon catheter includes a housing; a catheter shaft having a proximal end portion disposed in the housing and forming a liquid feeding path communicating with an inside of a balloon attached to a distal end portion; a supply-discharge line connection portion which has an internal space communicating with the liquid feeding path, and to which a supply-discharge line that supplies and discharges liquid to and from the liquid feeding path through the internal space can be connected; and a stopcock capable of closing the internal space of the supply-discharge line connection portion. A position of the supply-discharge line connection portion with respect to the housing is fixed.
    Type: Application
    Filed: March 31, 2021
    Publication date: May 11, 2023
    Inventors: Hiroyuki Harada, Yumi Oka, Kohei Fujii
  • Publication number: 20230133221
    Abstract: A battery pack includes a plurality of batteries, thermally conductive members which are in contact with the plurality of batteries, and a case which houses the plurality of batteries and the thermally conductive members. The case includes holding parts each of which is not in contact with an end surface of the thermally conductive member, regulates displacement of two surfaces of the thermally conductive member in a direction vertical to each of the two surfaces which are connected with the end surface and positioned on sides opposite to each other, is in contact with at least one of the two surfaces, and thereby holds an end part of the thermally conductive member.
    Type: Application
    Filed: March 29, 2021
    Publication date: May 4, 2023
    Inventors: Takafumi OYAKE, Makoto KUSAKABE, Masanori ISHIGAKI, Kosuke KUSABA, Satoshi YOSHIDA, Kohei FUJII
  • Publication number: 20230087721
    Abstract: A partial structure of a battery pack includes: a battery group which is formed by stacking a plurality of layers, each of the layers being formed by arranging cylindrical batteries in parallel in a plane, the cylindrical batteries belonging to adjacent layers being arranged by shifting alignment pitches by a half pitch from each other between the adjacent layers; heat transfer plates, wherein each of the heat transfer plates is in contact with side surfaces of the cylindrical batteries arranged on both surfaces of each of the heat transfer plates, is formed by a heat transfer corrugated plate member, and extends through a gap between the cylindrical batteries along an alignment direction of the cylindrical batteries in the layers in the plane intersecting center axis lines of the cylindrical batteries, a first intersection direction intersecting the alignment direction or a second intersection direction intersecting the alignment direction and the first intersection direction; and a radiator which is arrange
    Type: Application
    Filed: February 26, 2021
    Publication date: March 23, 2023
    Inventors: Takafumi OYAKE, Masanori ISHIGAKI, Tomohisa HARADA, Makoto KUSAKABE, Kosuke KUSABA, Satoshi YOSHIDA, Kohei FUJII
  • Publication number: 20220321062
    Abstract: Various aspects of integrated amplifiers, layouts for the integrated amplifiers, and packaged arrangements of the amplifiers are described. In one example, an amplifier includes an amplifier cell, and a biasing network coupled to the common gate transistor in the amplifier cell. The amplifier cell includes a common source transistor and a common gate transistor in a cascode arrangement, where at least one of the common source transistor and the common gate transistor comprises a field plate. Among other advantages, the amplifiers described herein can be biased with relatively high voltages and still operate like a single a common source transistor, without sacrificing reliability, performance, or requiring additional off-chip components, such as biasing networks of resistors and inductors.
    Type: Application
    Filed: March 31, 2021
    Publication date: October 6, 2022
    Inventors: Wayne Mack Struble, Shamit Som, Kohei Fujii, Quinn Martin, Walter Nagy
  • Publication number: 20220160422
    Abstract: A method of producing a catheter includes a step of arranging a lead wire in the lumen of a thermoplastic outer-layer tube such that the lead wire extends in the longitudinal direction of the outer-layer tube; a step of exposing one end of the lead wire out of an opening of the outer-layer tube; a step of joining the one end of the lead wire exposed out of the opening with the inner wall of a ring electrode; a step of covering the opening of the outer-layer tube with the ring electrode; an step of inserting a thermoplastic inner-layer tube in the lumen of the outer-layer tube; and an integrating step of heating the outer-layer tube and the inner-layer tube to integrate the outer-layer and the inner-layer tubes to form an electrode tip such that the lead wire is interlaminarly embedded and fixed between the outer-layer and the inner-layer tubes.
    Type: Application
    Filed: March 27, 2020
    Publication date: May 26, 2022
    Inventors: Yumi Oka, Kohei Fujii, Kota Tsukamoto
  • Patent number: 11156170
    Abstract: A control device for an internal combustion engine includes an internal combustion engine and a valve opening-closing timing control device. The valve opening-closing timing control device has a phase adjustment mechanism for setting a relative rotation phase of a driving-side rotator and a driven-side rotator. The phase adjustment mechanism overlaps a timing of opening an intake valve with a timing of opening an exhaust valve, by setting, in a predetermined period, the relative rotation phase such that the exhaust valve closes after a top dead center position has been reached, and a bypass passage is provided that connects an exhaust passage of one cylinder that is in an exhaust process to the exhaust passage of another cylinder that is in an intake process at the same time as the exhaust process.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: October 26, 2021
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Seiichi Fujimoto, Masaaki Kaneko, Hirokazu Tanaka, Suguru Kamiya, Kohei Fujii
  • Publication number: 20210140377
    Abstract: A control device for an internal combustion engine includes an internal combustion engine and a valve opening-closing timing control device. The valve opening-closing timing control device has a phase adjustment mechanism for setting a relative rotation phase of a driving-side rotator and a driven-side rotator. The phase adjustment mechanism overlaps a timing of opening an intake valve with a timing of opening an exhaust valve, by setting, in a predetermined period, the relative rotation phase such that the exhaust valve closes after a top dead center position has been reached, and a bypass passage is provided that connects an exhaust passage of one cylinder that is in an exhaust process to the exhaust passage of another cylinder that is in an intake process at the same time as the exhaust process.
    Type: Application
    Filed: February 28, 2018
    Publication date: May 13, 2021
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Seiichi FUJIMOTO, Masaaki KANEKO, Hirokazu TANAKA, Suguru KAMIYA, Kohei FUJII
  • Patent number: 10818617
    Abstract: Examples of a package for a flange mount device are described. In one example, the package includes a thermally conductive base, a base substrate, and a lid having a cavity. The base substrate includes a through hole and radio frequency (RF) input, RF output, and bias traces that extend to a perimeter of the through hole. The lid includes a cavity and RF input coupling, RF output coupling, and bias coupling traces. A device can be secured to the thermally conductive base, and the lid can be secured to the thermally conductive base, with the base substrate secured between the lid and the thermally conductive base, coupling the traces of the base substrate to the traces of the lid. Other components, such as biasing, blocking, and bypassing components can be easily integrated into the package. Impedance matching and electromagnetic shielding components can also be easily integrated into the package.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 27, 2020
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventor: Kohei Fujii
  • Patent number: 10651805
    Abstract: An apparatus includes a first directional coupler, a second directional coupler, a first detector, and a second detector. A through port of the first directional coupler is coupled to a through port of the second directional coupler. An isolated port of the first directional coupler is coupled to an isolated port of the second directional coupler. A coupled port of the first directional coupler is coupled to the first detector. A coupled port of the second directional coupler is coupled to the second detector. A detected power signal is generated by combining an output of the first detector and an output of the second detector.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: May 12, 2020
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventor: Kohei Fujii
  • Publication number: 20200105686
    Abstract: Examples of a package for a flange mount device are described. In one example, the package includes a thermally conductive base, a base substrate, and a lid having a cavity. The base substrate includes a through hole and radio frequency (RF) input, RF output, and bias traces that extend to a perimeter of the through hole. The lid includes a cavity and RF input coupling, RF output coupling, and bias coupling traces. A device can be secured to the thermally conductive base, and the lid can be secured to the thermally conductive base, with the base substrate secured between the lid and the thermally conductive base, coupling the traces of the base substrate to the traces of the lid. Other components, such as biasing, blocking, and bypassing components can be easily integrated into the package. Impedance matching and electromagnetic shielding components can also be easily integrated into the package.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Inventor: Kohei Fujii
  • Patent number: 10175402
    Abstract: A phase difference film layered body is obtained by stretching a film before stretching, the film before stretching including: a P1 layer formed of a resin p1 containing polyphenylene ether having a positive intrinsic birefringence value and a polystyrene-based polymer having a negative intrinsic birefringence value and having a syndiotactic structure; and a P2 layer disposed in contact with the P1 layer and formed of a resin p2 containing an acrylic resin or an alicyclic structure-containing polymer. In the resin p1, the weight ratio of (the content of the polyphenylene ether)/(the content of the polystyrene-based polymer) is 35/65 to 45/55. A method for producing the phase difference film layered body and a method for producing a phase difference film using the phase difference film layered body are also provided.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 8, 2019
    Assignee: ZEON CORPORATION
    Inventors: Takashi Morita, Kohei Fujii, Tomokazu Kinohira, Shunsuke Yamanaka, Taku Hatano
  • Publication number: 20180302044
    Abstract: An apparatus includes a first directional coupler, a second directional coupler, a first detector, and a second detector. A through port of the first directional coupler is coupled to a through port of the second directional coupler. An isolated port of the first directional coupler is coupled to an isolated port of the second directional coupler. A coupled port of the first directional coupler is coupled to the first detector. A coupled port of the second directional coupler is coupled to the second detector. A detected power signal is generated by combining an output of the first detector and an output of the second detector.
    Type: Application
    Filed: June 22, 2018
    Publication date: October 18, 2018
    Inventor: Kohei Fujii
  • Patent number: 10056870
    Abstract: An apparatus includes an input transformer, an amplifier and an output transformer. The input transformer may be on a substrate and configured to convert an input signal into a differential input signal. The input signal may be a radio-frequency signal. The amplifier may be on the substrate and configured to generate a differential output signal in response to the differential input signal. The amplifier may be a balanced and distributed amplifier. The output transformer may be on the substrate and configured to convert the differential output signal into an output signal. Each of the input transformer and the output transformer may be a three line coupled balun transformer with a variable bandpass bandwidth.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: August 21, 2018
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventor: Kohei Fujii
  • Patent number: D964559
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: September 20, 2022
    Assignee: Toray Industries, Inc.
    Inventors: Kohei Fujii, Yumi Oka, Hiroyuki Terasaka