Patents by Inventor Yohei Okamoto

Yohei Okamoto 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: 10967431
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: April 6, 2021
    Assignees: DAIHEN CORPORATION, FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Ryusuke Tsubota, Junichi Tanaka, Yohei Oka, Akira Okamoto, Masato Kikukawa, Hiroaki Okubo, Yoshito Nishizawa, Takeshi Maruyama, Motonori Nishida
  • Publication number: 20210020966
    Abstract: A fuel cell system includes: a fuel cell stack; a first cooling medium circuit through which a cooling medium for cooling the fuel cell stack flows; an ion exchanger that removes ions in the cooling medium; a second cooling medium circuit in which the average ion concentration of the cooling medium is lower than that of the cooling medium in the first cooling medium circuit; a switching valve that switches between a flow state and a low flow state; a pump configured to cause the cooling medium in the second cooling medium circuit to flow into the first cooling medium circuit; and a control unit that, when a stop period of the fuel cell system is longer than a reference period, drives the pump with the switching valve switched to the flow state after the instruction to start the fuel cell system is input.
    Type: Application
    Filed: July 14, 2020
    Publication date: January 21, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita YAMAUE, Yohei OKAMOTO, Hiroyuki IMANISHI
  • Publication number: 20200395646
    Abstract: An electromagnetic field band-stop filter includes a plurality of unit structures that have reflection characteristics on an electromagnetic wave of a predetermined frequency. Each of the plurality of unit structures includes: a plurality of electrode parts each of which is disposed along a side of a polygon in a non-contact manner with another electrode part; and a plurality of conductor parts which are provided for the plurality of electrode parts on a one-to-one basis and each of which has at least one bent portion between one end and other end, the one ends of the plurality of conductor parts being connected to the electrode parts on a one-to-one basis and the other ends of the plurality of conductor parts being connected at one point on an inner side of the electrode parts in the individual unit structure.
    Type: Application
    Filed: February 21, 2019
    Publication date: December 17, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Go ITAMI, Yohei TORIUMI, Ken OKAMOTO, Jun KATO
  • Patent number: 10807472
    Abstract: A vehicular display device includes: a display board for displaying a scale; a liquid crystal display panel including an image display surface for displaying an image, and having an overlapping region in which the image display surface overlaps the display board further rearward than the display board; a light source for illuminating the liquid crystal display panel; and a first light guide body for receiving light from the light source via the liquid crystal display panel and emitting the light. The first light guide body includes: a light receiving part disposed between the overlapping region of the image display surface and the display board, for receiving the light from the light source via the liquid crystal display panel; and a light-emitting part exposed outwardly from the display board as viewed by a viewer, for emitting light from the first light guide body that is received by the light-receiving part.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: October 20, 2020
    Assignees: NIPPON SEIKI CO., LTD., SUBARU CORPORATION
    Inventors: Takanori Shimizu, Kazufumi Suzuki, Ryouta Fujiwara, Yuka Hayakawa, Ryousuke Kakimaru, Shouma Nakata, Yohei Okamoto, Yuichi Nozaki
  • Publication number: 20200298729
    Abstract: Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicle 100 including an external power-feeding device 50, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cell 20 or a failure of a driving device to supply fuel to the fuel cell 20 occurs during external power feeding, warning is issued to outside of the vehicle 10 before the fuel cell 20 stops power generation.
    Type: Application
    Filed: June 11, 2020
    Publication date: September 24, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei OKAMOTO, Hiroyuki IMANISHI, Mitsuhiro NADA, Takashi YAMADA
  • Patent number: 10770548
    Abstract: A silicon nitride film having a thickness in a range from 1 [nm] to 3 [nm] is deposited on a front surface of a silicon carbide semiconductor base, by an ALD method. Next, on the silicon nitride film, for example, a silicon oxide film having a thickness in a range from 20 [nm] to 100 [nm] is deposited. After deposition of the silicon oxide film, for example, heat treatment is performed at a temperature in a range from 1100 degrees C. to 1350 degrees C., in a gas atmosphere that includes oxygen. By this heat treatment, nitrogen surface density of an interface of the silicon carbide semiconductor base and the silicon oxide film (gate insulating film) is increased, reducing interface state density of the interface of the silicon carbide semiconductor base and the silicon nitride film.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: September 8, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Tsuyoshi Araoka, Mitsuo Okamoto, Yohei Iwahashi
  • Publication number: 20200264161
    Abstract: A cancer risk evaluation method is provided, which makes it possible to estimate the risk of suffering from cancer of a subject with high accuracy, which do not have the disadvantages of early degeneration and high cost that arise in the case where the in-blood amino acid concentrations are utilized, and which are capable of estimating which site of cancer a subject has. This method includes the step S1 of measuring the concentrations of a set of evaluation elements contained in a serum sample 2 taken from a subject, the step S2 of applying concentration data of the set of elements thus measured and age data of the subject to a discriminant function or functions for discriminating to which of a case group and a control group the subject belongs to perform an operation; and the step S3 of obtaining an indicator for discriminating whether or not the subject suffers from any type of cancer based on a correlation among the set of evaluation elements obtained in the step S2.
    Type: Application
    Filed: September 27, 2018
    Publication date: August 20, 2020
    Applicant: Renatech Co., Ltd.
    Inventors: Seiichi Inagaki, Naoyuki Okamoto, Haruo Mikami, Yohei Miyagi
  • Patent number: 10744903
    Abstract: Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel cell stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicle 100 including an external power-feeding device 50, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cell 20 or a failure of a driving device to supply fuel to the fuel cell 20 occurs during external power feeding, warning is issued to outside of the vehicle 10 before the fuel cell 20 stops power generation.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 18, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yohei Okamoto, Hiroyuki Imanishi, Mitsuhiro Nada, Takashi Yamada
  • Publication number: 20200215916
    Abstract: A vehicular display device includes: a display board (25) for displaying a scale; a liquid crystal display panel (53a) including an image display surface (53c) for displaying an image, and having an overlapping region (53d) in which the image display surface (53c) overlaps the display board (25) further rearward than the display board (25); a light source for illuminating the liquid crystal display panel (53a); and a first light guide body (23) for receiving light from the light source via the liquid crystal display panel (53a) and emitting the light.
    Type: Application
    Filed: September 21, 2018
    Publication date: July 9, 2020
    Inventors: Takanori Shimizu, Kazufumi Suzuki, Ryouta Fujiwara, Yuka Hayakawa, Ryousuke Kakimaru, Shouma Nakata, Yohei Okamoto, Yuichi Nozaki
  • Patent number: 10633500
    Abstract: A manufacturing method of a tow prepreg, comprising: an impregnation process of impregnating a reinforcement fiber with an anhydrous epoxy resin to obtain a tow prepreg; and a process of irradiating a specific surface of the tow prepreg with laser beam to cure the epoxy resin on the specific surface.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: April 28, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yohei Okamoto
  • Patent number: 10528206
    Abstract: First to third electrode layers (1) are laminated. A dielectric (22) disposed between the second and third electrode layers can be elastically deformed by pressing force from the first electrode layer-side to reduce distance between the second and third electrode layers. The first electrode layer is composed of first electrodes (Rxc) along a first direction (X). The second electrode layer is composed of second electrodes (Txcf) along a second direction (Y) intersecting the first direction. The third electrode layer is composed of third electrodes (Rxf) along a third direction (X) intersecting the second direction. During position-detection, the second electrodes (Txcf) function as transmission-side position-detection electrodes and the first electrodes function as reception-side position detection electrodes to constitute a mutual-capacitance touch panel unit (31).
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: January 7, 2020
    Assignee: NISSHA CO., LTD.
    Inventors: Yoshiro Fujii, Ryomei Omote, Koji Okamoto, Toshihide Yamamoto, Yohei Matsuyama
  • Publication number: 20190384454
    Abstract: First to third electrode layers (1) are laminated. A dielectric (22) disposed between the second and third electrode layers can be elastically deformed by pressing force from the first electrode layer-side to reduce distance between the second and third electrode layers. The first electrode layer is composed of first electrodes (Rxc) along a first direction (X). The second electrode layer is composed of second electrodes (Txcf) along a second direction (Y) intersecting the first direction. The third electrode layer is composed of third electrodes (Rxf) along a third direction (X) intersecting the second direction. During position-detection, the second electrodes (Txcf) function as transmission-side position-detection electrodes and the first electrodes function as reception-side position detection electrodes to constitute a mutual-capacitance touch panel unit (31).
    Type: Application
    Filed: June 1, 2016
    Publication date: December 19, 2019
    Inventors: Yoshiro FUJII, Ryomei OMOTE, Koji OKAMOTO, Toshihide YAMAMOTO, Yohei MATSUYAMA
  • Patent number: 10465759
    Abstract: A piston has a piston main body including an aluminum alloy, and a covering layer formed on the outer surface of the piston main body, and the covering layer has a first plating layer including an iron-phosphorous alloy, and a second plating layer including a nickel-phosphorous alloy formed on the first plating layer.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: November 5, 2019
    Assignees: NISSIN KOGYO CO., LTD., SHINSHU UNIVERSITY
    Inventors: Minoru Okamoto, Yohei Takahashi, Susumu Arai, Miyoka Ueda
  • Publication number: 20190267451
    Abstract: A silicon nitride film having a thickness in a range from 1 [nm] to 3 [nm] is deposited on a front surface of a silicon carbide semiconductor base, by an ALD method. Next, on the silicon nitride film, for example, a silicon oxide film having a thickness in a range from 20 [nm] to 100 [nm] is deposited. After deposition of the silicon oxide film, for example, heat treatment is performed at a temperature in a range from 1100 degrees C. to 1350 degrees C., in a gas atmosphere that includes oxygen. By this heat treatment, nitrogen surface density of an interface of the silicon carbide semiconductor base and the silicon oxide film (gate insulating film) is increased, reducing interface state density of the interface of the silicon carbide semiconductor base and the silicon nitride film.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 29, 2019
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Tsuyoshi ARAOKA, Mitsuo OKAMOTO, Yohei IWAHASHI
  • Patent number: 10359754
    Abstract: A fuel cell system in which power generation is performed by a fuel cell, comprising: a power generation controller that performs: first control in which at least one of power control for preventing generated power from exceeding an upper limit value, voltage control for preventing generated voltage from falling below a lower limit value and current control for preventing generated current from exceeding an upper limit value is performed and second control in which the generated voltage is prevented from exceeding an upper limit value; and a priority instructor that instructs the power generation controller to prioritize the first control over the second control when the first control and the second control collide with each other.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 23, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yutaka Tano, Mitsuhiro Nada, Tomohiko Kaneko, Yohei Okamoto
  • Publication number: 20190214037
    Abstract: A recommendation device includes: a providing unit configured to provide recommendation information to a plurality of occupants in a vehicle; a sound collection device configured to collect a voice indicating a reaction of each occupant of the plurality of occupants to the recommendation information; a determination unit configured to determine whether the reaction of each occupant of the plurality of occupants to the recommendation information is a positive reaction or a negative reaction, based on the voice indicating the reaction of the occupant to the recommendation information; and an evaluation unit configured to evaluate an overall reaction of the plurality of occupants to the recommendation information, based on the reaction of each occupant of the plurality of occupants.
    Type: Application
    Filed: December 18, 2018
    Publication date: July 11, 2019
    Applicants: Toyota Jidosha Kabushiki Kaisha, DENSO TEN Limited
    Inventors: Takashige Hori, Yohei Okamoto, Masanobu Washio, Tatsuya Kuwamoto
  • Publication number: 20190168302
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 6, 2019
    Applicants: Daihen Corporation, Fukuda Metal Foil & Powder Co., Ltd.
    Inventors: Ryusuke Tsubota, Junichi Tanaka, Yohei Oka, Akira Okamoto, Masato Kikukawa, Hiroaki Okubo, Yoshito Nishizawa, Takeshi Maruyama, Motonori Nishida
  • Publication number: 20190168303
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 6, 2019
    Applicants: DAIHEN CORPORATION, FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Ryusuke TSUBOTA, Junichi TANAKA, Yohei OKA, Akira OKAMOTO, Masato KIKUKAWA, Hiroaki OKUBO, Yoshito NISHIZAWA, Takeshi MARUYAMA, Motonori NISHIDA
  • Patent number: 10224558
    Abstract: The present invention enables the determination of an operating point of a fuel cell so as to prioritize the fulfillment of an amount of required power generation while avoiding various limitations, such as a current limit, in a fuel cell system that warms up the fuel cell by a low efficiency operation. A controller 70 multiplies a voltage command value Vcom obtained in step S3 by a current command value Icom obtained in step S1, then, this is divided by a final voltage command value Vfcom obtained in step S4, thereby obtaining a final current command value Ifcom to determine an operating point (Ifcom, Vfcom) during a warm-up operation (step S5), and then the process ends.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: March 5, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiko Kaneko, Yoshiaki Naganuma, Yutaka Tano, Yohei Okamoto
  • Patent number: 10218008
    Abstract: A fuel cell system includes: a fuel cell; a coolant circulation passage; a radiator; a water pump; a flow dividing valve; a fan; and a controller that, when a first prescribed period elapses in a state where a temperature of a coolant is equal to or more than a first prescribed temperature and an opening degree of the flow dividing valve makes the flow rate of the coolant flowing into the radiator equal to or more than a prescribed flow rate, gives a priority to the rise in a driving voltage of the fan over the increase in a flow rate by the water pump, and when a second prescribed period elapses in a state where the temperature of the coolant is equal to or more than a second prescribed temperature after the driving voltage of the fan is raised, increases the flow rate by the water pump.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: February 26, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takashi Yamada, Hiroyuki Imanishi, Yohei Okamoto