Patents by Inventor Atsushi Yamada

Atsushi Yamada 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: 20210234029
    Abstract: A disclosed semiconductor device includes an electron transit layer; an electron supply layer disposed on or above the electron transit layer; and a capping layer disposed on or above the electron supply layer, wherein a first lattice constant of the electron transit layer is greater than a second lattice constant of the electron supply layer in a direction parallel to a main surface of the electron transit layer.
    Type: Application
    Filed: December 21, 2020
    Publication date: July 29, 2021
    Applicant: FUJITSU LIMITED
    Inventor: Atsushi YAMADA
  • Publication number: 20210234031
    Abstract: A disclosed semiconductor device includes an electron transit layer; an electron supply layer disposed above the electron transit layer; a source electrode, a drain electrode, and a gate electrode, the source electrode, the drain electrode, and the gate electrode being disposed on the electron supply layer; a first capping layer disposed on the electron supply layer between the gate electrode and the drain electrode; and a negative charge generation layer disposed on the first capping layer, the negative charge generation layer being configured to generate a negative charge.
    Type: Application
    Filed: December 21, 2020
    Publication date: July 29, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Kozo MAKIYAMA, Shirou OZAKI, Atsushi YAMADA, Junji KOTANI
  • Patent number: 11073342
    Abstract: A regenerative heat exchanger includes a refrigerant pipe, a regenerator, and an air passage fin. The air passage fin is disposed in an air passage defined outside of the refrigerant pipe and the regenerator, and is thermally connected with the regenerator directly or through the refrigerant pipe. At least one of the regenerator and the air passage fin is configured such that a thermal resistance between a part of a regenerative material located on an upstream side and air flowing through the air passage becomes larger than a thermal resistance between a part of the regenerative material located on a downstream side and air flowing through the air passage.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: July 27, 2021
    Assignee: DENSO CORPORATION
    Inventors: Atsushi Yamada, Shin Nishida, Takayuki Ota, Takashi Danjo
  • Patent number: 11037927
    Abstract: An electronic circuit includes a noise source and an analog circuit and a logic circuit that may be adversely affected by noise. At least a portion of the analog circuit and the logic circuit is formed on a buried impurity layer whose conductivity is different from that of a substrate, and at least a portion of the periphery of that portion is surrounded by an impurity layer that is different from the substrate. Thus, propagation of the noise from the noise source is prevented.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: June 15, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Isamu Moriya, Atsushi Yamada
  • Patent number: 11032880
    Abstract: A light emission control device includes a power source circuit for a drive circuit that supplies a power for a drive circuit based on an input power, a power source circuit for a control circuit that supplies a power for a control circuit based on the input power, a control circuit, a drive circuit, and a start control circuit. The control circuit outputs a control signal for controlling turning on/off of a switching element. The drive circuit outputs a drive signal for driving the switching element based on the control signal. The start control circuit outputs a start control signal for delaying a timing at which the output of the drive signal is started after the input power is turned on.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: June 8, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Atsushi Yamada
  • Patent number: 11029073
    Abstract: A cold storage heat exchanger includes refrigerant tubes having therein refrigerant passages and arranged to provide a clearance therebetween. A cold storage container is bonded to a refrigerant tube and defines therein a compartment receiving a cold storage material. The cold storage container has protrusion portions protruding outward and being in contact with the refrigerant tube.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: June 8, 2021
    Assignee: DENSO CORPORATION
    Inventors: Atsushi Yamada, Seiji Inoue, Yoshio Miyata, Naoki Yokoyama, Etsuo Hasegawa, Jun Abei, Hiroshi Ishikawa, Aun Ota, Kouta Hagihara
  • Publication number: 20210146096
    Abstract: A movable catheter is provided with a tube having a main lumen. The tube has a plurality of wire lumens and is provided with a wire. A substantial half on one end portion side thereof is inserted through the wire lumen, an intermediate part thereof is folded back in the distal end portion of the tube, and a substantial half on the other end portion side thereof is inserted through the wire lumen. The one end portion and the other end portion thereof are disposed on the proximal end side of the tube. Various embodiments enable the number of components to be reduced, and to reduce the number of manufacturing steps.
    Type: Application
    Filed: April 9, 2019
    Publication date: May 20, 2021
    Inventors: Atsushi YAMADA, Tohru TANI, Wataru YONEMICHI
  • Publication number: 20210144813
    Abstract: A heat generator includes an electrode terminal, a heating element, an electrically conductive housing, and an insulator. The electrode terminal is stacked on the heating element in a stacking direction. The housing houses a stacked body formed of the heating element and the electrode terminal. The stacked body includes a pair of side wall surfaces each extending in the stacking direction, an element side end surface, and a terminal side end surface. The element side end surface is in close contact with the case inner wall surface. Both the terminal side end surface and the pair of side wall surfaces are entirely in close contact with the case inner wall through the insulator. The housing includes a pair of facing walls facing and extending along the pair of side wall surfaces to serve as a positioning member that restricts the heating element from moving in the intersecting direction.
    Type: Application
    Filed: January 18, 2021
    Publication date: May 13, 2021
    Inventors: Izuna TSUBOI, Yasuhito NOGUCHI, Atsushi YAMADA, Yoshiaki SUZUKI
  • Patent number: 10992269
    Abstract: A compound semiconductor device includes a first compound semiconductor layer containing a p-type impurity, a second compound semiconductor layer disposed over the first compound semiconductor layer and containing InGaN, an electron transit layer disposed over the second compound semiconductor layer, and an electron supply layer disposed over the electron transit layer.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: April 27, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Tetsuro Ishiguro, Atsushi Yamada, Junji Kotani, Norikazu Nakamura, Kozo Makiyama
  • Patent number: 10988141
    Abstract: An engine lubrication system including: an oil pump configured to be driven by an engine; an oil jet mechanism configured to inject oil pressure-fed by the oil pump to a piston; and circuitry configured to set a target hydraulic pressure of the oil injected from the oil jet mechanism according to an operation state of the engine; determine a hydraulic pressure state of the oil injected from the oil jet mechanism; and change a gear stage of the automatic transmission to a lower gear stage in a case that a predetermined condition between the determined hydraulic pressure state and the target hydraulic pressure is satisfied.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: April 27, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kenta Honda, Masanori Hashimoto, Daisuke Fukuda, Atsushi Yamada, Daisuke Shimo
  • Publication number: 20210116648
    Abstract: A driving force generating unit 27 that generates a driving force; a movable portion 29 that is movable in a crossing direction crossing an axial direction of the ferrule by the driving force of the driving force generating unit; a friction contact portion 31 that is provided on the movable portion to be in contact with an outer periphery of the ferrule, the friction contact portion being configured to rotate the ferrule by a frictional force when the movable portion is moved; and a controller that controls the driving force generating unit are provided, and the controller controls the driving force generating unit to move the movable portion in one direction of the crossing direction for rotating the ferrule by the friction contact portion for measuring the eccentricity, and further move the movable portion to the one direction of the crossing direction for rotating the ferrule by the friction contact portion for adjusting the eccentric direction to the predetermined direction.
    Type: Application
    Filed: April 23, 2020
    Publication date: April 22, 2021
    Inventor: Atsushi YAMADA
  • Patent number: 10976083
    Abstract: A cold energy storage evaporator is used in a vehicle refrigeration cycle device configured to cool a vehicle compartment. The cold energy storage evaporator includes a refrigerant tube through which a refrigerant flows, and a cold energy storage member that is in close contact with the refrigerant tube, the cold energy container accommodating therein a cold energy storage member configured to freeze due to heat absorption by the refrigerant. A melting point of the cold energy storage member is higher than 11 degrees Celsius.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: April 13, 2021
    Assignee: DENSO CORPORATION
    Inventors: Atsushi Yamada, Shin Nishida, Takayuki Ota, Takashi Danjo
  • Publication number: 20210097451
    Abstract: It is an object to provide an information processing apparatus in which an evaluation value of an in-site seat varies as necessary. The information processing apparatus 100 includes the storage unit 18, the receiving unit 15, and the CPU (calculation unit, control unit) 11. The storage unit 18 storage unit stores evaluation values of multiple seats. The receiving unit 15 receives a change of an environment. The calculation unit 11 calculates an effect of the change of the environment on each of the seats. The control unit 11 updates an evaluation value based on a calculation result. The receiving unit 15 receives an in-site environment from the multiple sensors 120 that detect the in-site environment. The CPU 11 updates the evaluation value based on the sensor information.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 1, 2021
    Applicant: GURUNAVI, INC.
    Inventor: Atsushi YAMADA
  • Patent number: 10954102
    Abstract: A diagnostic step for a passenger conveyor comprises at least one camera for shooting at least one lateral side of the interior space of the passenger conveyor, at least one directional microphone pointed to said at least one lateral side of the interior space of the passenger conveyor and an analyzer unit which receives image data from the camera and sound data from the directional microphone and transmits the data to an outside network.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: March 23, 2021
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Atsushi Yamada, Hiromitsu Miyajima
  • Patent number: 10958450
    Abstract: In a general aspect, a multiple-entity root certificate data block chain is constructed and maintained for use in a cryptography system. In some aspects, a genesis data block includes genesis block data entries representing respective member entities of a root certificate authority consortium. A block chain comprising the genesis block is provided for use by one or more end entities as a root certificate data block chain in a cryptography system. In some aspects, an action data block comprising an action block data entry is generated and sent to member entities of the root certificate authority consortium. An action block based on the action data block is generated and associated with an existing block of the block chain. The block chain comprising the action block is providing for use, by one or more end entities, as a root certificate data block chain in the cryptography system.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: March 23, 2021
    Assignee: ISARA Corporation
    Inventor: Atsushi Yamada
  • Patent number: 10945321
    Abstract: Provided is a light source apparatus including semiconductor light sources and a current detection resistor connected in series, a power source circuit that allows current to flow thereto, a current detection circuit that detects current flowing to the current detection resistor and outputs a current detection signal, a control circuit that controls the power source circuit such that a voltage of the current detection signal approaches a target value, a bypass circuit connected in parallel to the semiconductor light sources, and including a clamp element having a clamp voltage higher than a maximum voltage during operation of the semiconductor light sources and a bypass resistor connected in series to the clamp element, and allowing current to flow when an open fault occurs in the semiconductor light sources, and detection circuits that respectively detect an open fault in the semiconductor light sources based on an end-to-end voltage of the bypass resistors.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: March 9, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Atsushi Yamada
  • Publication number: 20210061393
    Abstract: A fuel tank structure that makes it difficult for mud, water, dust or the like to enter a fuel tank and that can restrict a fuel leakage path when a vehicle falls. A fuel cap includes a cap body mounted to a fuel supply port of a fuel tank, and a pressure adjusting device provided in the cap body to adjust a pressure in the fuel tank. In the fuel cap, a space is formed as a hermetically closed space in which the pressure adjusting device is accommodated, and the space communicates with an exterior of the fuel tank via a breather tube.
    Type: Application
    Filed: September 3, 2018
    Publication date: March 4, 2021
    Inventors: Hikaru Yokomura, Atsushi Yamada, Keigo Mine, Tasuku Yamaguchi
  • Publication number: 20210057305
    Abstract: A semiconductor device includes a substrate, an insulating layer provided over the substrate, a collection of metal particles exposed on the surface of the insulating layer, and a diamond layer provided on the surface of the insulating layer on which the metal particles are exposed. By controlling the surface density and particle size of the metal particles on the surface of the insulating layer, the surface density of diamond nuclei that are formed on the surface is controlled. Diamond grains are formed by crystal growth using the diamond nuclei as starting material, thereby forming a diamond layer. The control of the surface density of the diamond nuclei results in forming, by the crystal growth, the diamond grains with a grain size exhibiting a relatively high thermal conductivity in the crystal growth initial layer of the diamond layer and improving the thermal conductivity between the diamond layer and the substrate.
    Type: Application
    Filed: July 15, 2020
    Publication date: February 25, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Junya Yaita, Atsushi Yamada
  • Patent number: 10924588
    Abstract: Provided is a public network connection control method including the steps of: receiving a connection request to a public network (5) from a mobile terminal (1); installing an application in the mobile terminal (1) or transmitting installation information if the connection request to the public network (5) is received; and transmitting the connection request to the public network (5) to a public wireless LAN connection control device (4) if the connection request to the public network (5) is received.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: February 16, 2021
    Assignee: GURUNAVI. INC.
    Inventor: Atsushi Yamada
  • Publication number: 20210035491
    Abstract: A circuit device includes an N-type well on a P-type substrate, a P-type well provided in the N-type well, a circuit element provided in the P-type well, a P-type well provided in an N-type well, and a circuit element provided in the P-type well. A ground power supply voltage is supplied to a P-type well. A power supply voltage different from the ground power supply voltage is supplied to a P-type well. The ground power supply voltage or a first potential that is greater than or equal to the potential of the ground power supply voltage and less than the potential of a high potential-side power supply voltage is supplied to an N-type well.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 4, 2021
    Inventors: Kei ISHIMARU, Atsushi YAMADA