Patents by Inventor Takayuki Kawahara

Takayuki Kawahara 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: 10647075
    Abstract: A friction transmission belt has a rubber layer forming a pulley contacting portion. The rubber layer is made of a rubber composition containing a crosslinked rubber component and crosslinked polyolefin particles. Examples of the crosslinked polyolefin particles can contain ultrahigh molecular weight polyolefin particles having an average molecular weight of 500,000 or more.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: May 12, 2020
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Takayuki Okubo, Hisashi Matsuda, Hideaki Kawahara, Shinji Takahashi
  • Publication number: 20190358953
    Abstract: A liquid discharge head includes a plurality of nozzles arrayed in a nozzle array direction to discharge a liquid; a plurality of pressure chambers arrayed in the nozzle array direction and communicating with the plurality of nozzles, respectively; and a diaphragm forming a displaceable wall of each of the plurality of pressure chambers. The diaphragm includes a concave portion outside an arrangement region of the plurality of pressure chambers in which the plurality of pressure chambers is arrayed in the nozzle array direction.
    Type: Application
    Filed: May 17, 2019
    Publication date: November 28, 2019
    Inventors: Junichi IWATA, Yoshitaka FUJINUMA, Kanshi ABE, Takayuki NAKAI, Koji KAWAHARA
  • Patent number: 10481125
    Abstract: To a biomolecule measuring apparatus, a semiconductor sensor for detecting ions generated by a reaction between a biomolecular sample and a reagent is set. The semiconductor sensor has a plurality of cells which are arranged on a semiconductor substrate, and each of which detects ions, and a plurality of readout wires. Each of the plurality of cells has an ISFET which has a floating gate and which detects ions, a first MOSFET M2 for amplifying an output from the ISFET, and a second MOSFET M3 which selectively transmits an output from the first MOSFET to a corresponding readout wire R1. Each of the plurality of cells is provided with a third MOSFET M1 which generates hot electrons in the ISFET and which injects a charge to the floating gate of the ISFET. Here, the second MOSFET and the third MOSFET are separately controlled.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: November 19, 2019
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Takayuki Kawahara, Yoshimitsu Yanagawa, Naoshi Itabashi, Riichiro Takemura
  • Patent number: 10451584
    Abstract: Provided is a biomolecule measuring device capable of effectively reducing measurement noise occurring when measuring a biomolecule sample using a semiconductor sensor. This biomolecule measuring device generates a trigger to react a sample with a reagent after starting to send the reagent onto the semiconductor sensor that detects ion concentration (see FIG. 7).
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: October 22, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yoshimitsu Yanagawa, Takahide Yokoi, Naoshi Itabashi, Takayuki Kawahara, Sonoko Migitaka, Makiko Yoshida, Takamichi Muramatsu
  • Patent number: 10323717
    Abstract: In a friction transmission belt including a rubber layer forming a pulley contact surface, the rubber layer includes a rubber composition containing hydrophilic inorganic filler and a sliding-resistant material. The sliding-resistant material protrudes from the pulley contact surface, and is at least one of hydrophobic resin particles and hydrophobic resin fibers having an official regain of 0.4% or below, and in the rubber composition, a content of the hydrophilic inorganic filler with respect to 100 parts by mass of the rubber component is 35 parts by mass or more.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: June 18, 2019
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takayuki Okubo, Shinji Takahashi, Hideaki Kawahara
  • Patent number: 10309487
    Abstract: In a friction transmission belt including a rubber layer forming a pulley contact surface, the rubber layer includes a rubber composition containing polyolefin particles and an inorganic filler. In the rubber composition, a total content of the polyolefin particles and the inorganic filler with respect to 100 parts by mass of a rubber component is 85 parts by mass or more.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: June 4, 2019
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takayuki Okubo, Shinji Takahashi, Hideaki Kawahara
  • Patent number: 9725753
    Abstract: Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. 1).
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: August 8, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Ono, Tatsuo Nakagawa, Yoshimitsu Yanagawa, Takayuki Kawahara, Akira Kotabe, Riichiro Takemura
  • Publication number: 20160245777
    Abstract: To a biomolecule measuring apparatus, a semiconductor sensor for detecting ions generated by a reaction between a biomolecular sample and a reagent is set. The semiconductor sensor has a plurality of cells which are arranged on a semiconductor substrate, and each of which detects ions, and a plurality of readout wires. Each of the plurality of cells has an ISFET which has a floating gate and which detects ions, a first MOSFET M2 for amplifying an output from the ISFET, and a second MOSFET M3 which selectively transmits an output from the first MOSFET to a corresponding readout wire R1. Each of the plurality of cells is provided with a third MOSFET M1 which generates hot electrons in the ISFET and which injects a charge to the floating gate of the ISFET. Here, the second MOSFET and the third MOSFET are separately controlled.
    Type: Application
    Filed: October 2, 2014
    Publication date: August 25, 2016
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Takayuki Kawahara, Yoshimitsu Yanagawa, Naoshi Itabashi, Riichiro Takemura
  • Patent number: 9318178
    Abstract: Since a nonvolatile RAM allows random reading and writing operations, an erasing mode is unnecessary. From the system side, however, it is desirable to have the erasing mode because of its nonvolatile characteristic. Moreover, the erasing operation is desirably carried out at high speed with low power consumption. Therefore, memory cell arrays COA and DTA containing a plurality of memory cells MC each having a magnetoresistive element are provided, a series of data is written to the memory cell arrays COA and DTA, and at the time of erasing, an erasing operation is carried out by writing predetermined data only to the memory cell array COA.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: April 19, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono, Nobuaki Kohinata
  • Patent number: 9257483
    Abstract: There is provided a magnetic memory with using a magnetoresistive effect element of a spin-injection magnetization reversal type, in which a multi-value operation is possible and whose manufacturing and operation are simple. A preferred aim of this is solved by providing two or more magnetoresistive effect elements which are electrically connected in series to each other and by selecting one of the series-connected elements depending on a direction of a current carried in the series-connected elements, a magnitude thereof, and an order of the current thereof for performing the writing operation. For example, it is solved by differentiating plane area sizes of the respective magnetoresistive effect elements which have the same film structure from each other so as to differentiate resistance change amounts caused by respective magnetization reversal and threshold current values required for respective magnetization reversal from each other.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: February 9, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Ishigaki, Takayuki Kawahara, Riichiro Takemura, Kazuo Ono, Kenchi Ito
  • Publication number: 20150362458
    Abstract: Provided is a biomolecule measuring device capable of effectively reducing measurement noise occurring when measuring a biomolecule sample using a semiconductor sensor. This biomolecule measuring device generates a trigger to react a sample with a reagent after starting to send the reagent onto the semiconductor sensor that detects ion concentration (see FIG. 7).
    Type: Application
    Filed: November 18, 2013
    Publication date: December 17, 2015
    Inventors: Yoshimitsu YANAGAWA, Takahide YOKOI, Naoshi ITABASHI, Takayuki KAWAHARA, Sonoko MIGITAKA, Makiko YOSHIDA, Takamichi MURAMATSU
  • Patent number: 9177628
    Abstract: An array configuration capable of supplying a necessary and sufficient current in a small area is achieved and a reference cell configuration suitable to temperature characteristics of a TMR element is achieved. In a memory using inversion of spin transfer switching, a plurality of program drivers are arranged separately along one global bit line, and one sense amplifier is provided to one global bit line. A reference cell to which “1” and “0” are programmed is shared by two arrays and a sense amplifier.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: November 3, 2015
    Assignee: HITACHI, LTD.
    Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono
  • Publication number: 20150220899
    Abstract: A commodity data registration apparatus, connected with a checkout apparatus which executes settlement processing of one transaction of the commodity by operations of a customer through network, comprises a specification information determination module for determining specification information for specifying an input commodity; a calculation module for calculating a total amount of one transaction according to sales data based on the specified information; a cash voucher amount input module for inputting a cash voucher amount of one or multiple cash vouchers; a determination module for determining whether or not the input cash voucher amount is greater than the total amount; a change amount calculation module for calculating change amount according to the cash voucher amount and the total amount if the cash voucher amount is greater than the total amount; and a sending module for sending transaction data containing the change amount, the sales data and the total amount to the checkout apparatus.
    Type: Application
    Filed: January 30, 2015
    Publication date: August 6, 2015
    Inventors: Shinya Namura, Nobuhiro Sugita, Takayuki Kawahara
  • Publication number: 20150213425
    Abstract: In accordance with one embodiment, a commodity data registration apparatus comprises a communication control module configured to control communication with a checkout apparatus connected through a network, an information input module configured to input identification information for identifying various commodities, a specification module configured to specify a commodity based on the identification information upon input of the identification information, a registration module configured to register sales data of the specified commodity indicating the content of one transaction of the commodity, a calculation module configured to calculate a total amount of the one transaction based on the registered sales data if the closing of the one transaction is declared, and a sending module configured to send a checkout data including the registered sales data and the calculated total amount to the checkout apparatus through the communication control module.
    Type: Application
    Filed: January 30, 2015
    Publication date: July 30, 2015
    Inventors: Shinya Namura, Nobuhiro Sugita, Takayuki Kawahara
  • Publication number: 20150036423
    Abstract: An array configuration capable of supplying a necessary and sufficient current in a small area is achieved and a reference cell configuration suitable to temperature characteristics of a TMR element is achieved. In a memory using inversion of spin transfer switching, a plurality of program drivers are arranged separately along one global bit line, and one sense amplifier is provided to one global bit line. A reference cell to which “1” and “0” are programmed is shared by two arrays and a sense amplifier.
    Type: Application
    Filed: August 12, 2014
    Publication date: February 5, 2015
    Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono
  • Patent number: 8837251
    Abstract: An array configuration capable of supplying a necessary and sufficient current in a small area is achieved and a reference cell configuration suitable to temperature characteristics of a TMR element is achieved. In a memory using inversion of spin transfer switching, a plurality of program drivers are arranged separately along one global bit line, and one sense amplifier is provided to one global bit line. A reference cell to which “1” and “0” are programmed is shared by two arrays and a sense amplifier.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: September 16, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono
  • Patent number: 8750032
    Abstract: The disclosed semiconductor recording device achieves multi-valued reading and writing using a spin-injection magnetization-reversal tunneling magnetoresistive element (TMR element). A first current that has at least the same value as that of the element requiring the highest current to reverse the magnetization thereof among a plurality of TMR elements is, in the direction that causes reversal to either a parallel state or an anti-parallel state, applied to a memory cell having the plurality of TMR elements, and then a second current which is in the reverse direction from the first current and of which only the value needed to reverse the magnetoresistance state of at least one TMR element excluding the element requiring the maximum current among the plurality of TMR elements is applied to each, and multi-valued writing is performed.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: June 10, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Kawahara, Riichiro Takemura, Takashi Ishigaki, Kiyoo Itoh
  • Publication number: 20140154790
    Abstract: Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. 1).
    Type: Application
    Filed: May 31, 2011
    Publication date: June 5, 2014
    Applicant: HITACHI, LTD.
    Inventors: Kazuo Ono, Tatsuo Nakagawa, Yoshimitsu Yanagawa, Takayuki Kawahara, Akira Kotabe, Riichiro Takemura
  • Patent number: 8587995
    Abstract: For example, one memory cell is configured using two memory cell transistors and one phase change element by disposing a plurality of diffusion layers in parallel to a bit-line, disposing gates between the diffusion layers so as to cross the bit-line, disposing bit-line contacts and source contacts alternately to the plurality of diffusion layers arranged in a bit-line direction for each diffusion layer, and providing a phase change element on the source contact. Also, the phase change element can be provided on the bit-line contact instead of the source contact. By this means, for example, increase in drivability of the memory cell transistors and reduction in area can be realized.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: November 19, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Riichiro Takemura, Kenzo Kurotsuchi, Takayuki Kawahara
  • Publication number: 20130261413
    Abstract: To obtain a blood sugar level accurately, the location of a blood-vessel part is specified by using a first wavelength at which absorption by hemoglobin, which is a component unique to blood, is high, and data of light absorbance measured by using a second wavelength at which absorption by glucose is high is separated into a blood-vessel part and other parts.
    Type: Application
    Filed: October 14, 2010
    Publication date: October 3, 2013
    Applicant: HITACHI, LTD.
    Inventors: Takayuki Kawahara, Riichiro Takemura, Tsuyoshi Sonehara, Akio Nagasaka