Patents by Inventor Kazuo Fukuda

Kazuo Fukuda 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: 10816558
    Abstract: An ascorbic acid responsive electrode comprising an electrode, and a detection layer comprising a non-catalytic electron acceptor that receives an electron from ascorbic acid, an amino acid, and a saccharide and/or a soluble protein; wherein in the detection layer the electron acceptor is reduced by the ascorbic acid, and the reduced electron acceptor is oxidized at the electrode.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: October 27, 2020
    Assignee: ARKRAY, Inc.
    Inventor: Kazuo Fukuda
  • Patent number: 10619178
    Abstract: The disclosure relates to a biosensor including electrodes, a hydrophilic region or layer, and a reagent layer that contains an enzyme and a mediator, and methods of producing thereof.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: April 14, 2020
    Assignee: ARKRAY, Inc.
    Inventor: Kazuo Fukuda
  • Patent number: 10591459
    Abstract: Provided are a measuring apparatus and method for obtaining a measurement value from a response to a signal applied to a sample, wherein the measuring apparatus includes a first measuring unit that measures a first electric response to a first signal that is input to a first pair of electrodes that can come into contact with a sample, a second measuring unit that measures a second electric response to a second signal that is input to a second pair of electrodes that can come into contact with the sample, the second signal changing its value from a first level to a second level and thereafter maintaining the second level for a certain period of time, as a peak value of a response signal with respect to the change in the second signal, and a control unit that corrects a value indicating the amount of a measuring target component of the sample, the value being obtained from the first electric response, based on the peak value of the response signal.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: March 17, 2020
    Assignee: ARKRAY, Inc.
    Inventors: Kazuo Fukuda, Hirokazu Matsuda, Akiko Okami
  • Publication number: 20190184100
    Abstract: A method of performing an intravenous drip injection includes a first step, a second step, a third step and a fourth step. A first step includes starting dosing an infusion solution containing a predetermined component by the intravenous drip injection to a dosing recipient. A second step includes extracting a body fluid from the dosing recipient being dosed with the infusion solution. A third step includes measuring a concentration of the predetermined component in the extracted body fluid. A fourth step includes varying the concentration of the predetermined component in the infusion solution, corresponding to the concentration of the predetermined component in the body fluid.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 20, 2019
    Applicant: ARKRAY, Inc.
    Inventors: Kazuo Fukuda, Tsuyoshi Takasu
  • Publication number: 20190120861
    Abstract: An ascorbic acid responsive electrode comprising an electrode, and a detection layer comprising a non-catalytic electron acceptor that receives an electron from ascorbic acid, an amino acid, and a saccharide and/or a soluble protein; wherein in the detection layer the electron acceptor is reduced by the ascorbic acid, and the reduced electron acceptor is oxidized at the electrode.
    Type: Application
    Filed: October 23, 2018
    Publication date: April 25, 2019
    Applicant: ARKRAY, Inc.
    Inventor: Kazuo Fukuda
  • Patent number: 10234414
    Abstract: A measurement apparatus to measure a physical quantity related to a measurement target by use of a sensor, comprising: an apparatus enclosure; a control unit to be electrically connected to the sensor; and a moving member including a sensor holding unit to hold the sensor, the moving member being movable to protrude the sensor holding unit outwardly of the apparatus enclosure and further including a conductive member to electrically connect the sensor to the control unit.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: March 19, 2019
    Assignee: ARKRAY, Inc.
    Inventors: Yuji Kurata, Kazuo Fukuda, Yoshiharu Sato, Gai Go
  • Publication number: 20180355395
    Abstract: Provided is a biosensor for measuring a target substance in a sample, wherein the biosensor comprises an electrode pair comprising a working electrode and a counter electrode, and reagents placed at least on the working electrode, wherein the reagents comprise a first oxidoreductase which oxidizes/reduces the target substance, at least one mediator which transfers electrons generated from an oxidation reduction reaction by the first oxidoreductase to the electrode, and a second oxidoreductase which oxidizes/reduces an interfering substance, and wherein the oxidation-reduction potential of the mediator is higher than the oxidation-reduction potential of the first oxidoreductase and lower than the oxidation-reduction potential of the second oxidoreductase.
    Type: Application
    Filed: June 11, 2018
    Publication date: December 13, 2018
    Applicant: ARKRAY, Inc.
    Inventor: Kazuo Fukuda
  • Publication number: 20180057851
    Abstract: The disclosure relates to a biosensor including electrodes, a hydrophilic region or layer, and a reagent layer that contains an enzyme and a mediator, and methods of producing thereof.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Applicant: ARKRAY, Inc.
    Inventor: Kazuo Fukuda
  • Patent number: 9562909
    Abstract: A sensor includes a substrate that includes an upper substrate and a lower substrate, and an electrode that is provided on the lower substrate, and the upper substrate, the lower substrate, and the electrode are formed by an optically transparent member.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: February 7, 2017
    Assignee: ARKRAY, Inc.
    Inventors: Kazuo Fukuda, Hisashi Kaneda
  • Publication number: 20160018353
    Abstract: A measurement apparatus to measure a physical quantity related to a measurement target by use of a sensor, comprising: an apparatus enclosure; a control unit to be electrically connected to the sensor; and a moving member including a sensor holding unit to hold the sensor, the moving member being movable to protrude the sensor holding unit outwardly of the apparatus enclosure and further including a conductive member to electrically connect the sensor to the control unit.
    Type: Application
    Filed: May 12, 2015
    Publication date: January 21, 2016
    Applicant: ARKRAY, INC.
    Inventors: Yuji KURATA, Kazuo FUKUDA, Yoshiharu SATO, Gai GO
  • Publication number: 20150293112
    Abstract: A sensor includes a substrate that includes an upper substrate and a lower substrate, and an electrode that is provided on the lower substrate, and the upper substrate, the lower substrate, and the electrode are formed by an optically transparent member.
    Type: Application
    Filed: April 10, 2015
    Publication date: October 15, 2015
    Applicant: ARKRAY, INC.
    Inventors: Kazuo Fukuda, Hisashi Kaneda
  • Publication number: 20150129434
    Abstract: An apparatus and a method that can detect a defective analytical device due to the scattering of a reagent are provided. In particular, a blood glucose level meter (measuring apparatus) 1 is configured to measure a target component of a biological sample using a reagent. The apparatus includes a second measuring unit (measuring unit) 31b configured to measure an electrical response to a detection signal applied to a pair of hematocrit electrodes (test electrode pair), and a control unit 33 configured to determine the presence or absence of the reagent on the pair of hematocrit electrodes based on the measured electrical response.
    Type: Application
    Filed: November 4, 2014
    Publication date: May 14, 2015
    Applicant: ARKRAY, INC.
    Inventors: Kazuo Fukuda, Yoshiharu Sato, Akiko Okami
  • Publication number: 20140326037
    Abstract: Provided are a measuring apparatus and method for obtaining a measurement value from a response to a signal applied to a sample, wherein the measuring apparatus includes a first measuring unit that measures a first electric response to a first signal that is input to a first pair of electrodes that can come into contact with a sample, a second measuring unit that measures a second electric response to a second signal that is input to a second pair of electrodes that can come into contact with the sample, the second signal changing its value from a first level to a second level and thereafter maintaining the second level for a certain period of time, as a peak value of a response signal with respect to the change in the second signal, and a control unit that corrects a value indicating the amount of a measuring target component of the sample, the value being obtained from the first electric response, based on the peak value of the response signal.
    Type: Application
    Filed: April 29, 2014
    Publication date: November 6, 2014
    Applicant: ARKRAY, Inc.
    Inventors: Kazuo Fukuda, Hirokazu Matsuda, Akiko Okami
  • Publication number: 20130261418
    Abstract: A measuring apparatus (10) for measuring the condition of a measurement subject includes: a recording unit (11) configured to record a plurality of behaviors that can be set in the measuring apparatus (10), and pieces of identification information that are associated with the plurality of behaviors; an output unit (13) configured to output the behaviors; and a setting unit (12) configured to specify a piece of identification information that is correlated with a measurement result in accordance with external input, and to set the specified piece of identification information and a behavior associated therewith, as identification information and a behavior that are to be used.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 3, 2013
    Applicant: ARKRAY, Inc.
    Inventors: Kazuo Fukuda, Hiroyuki Nakanishi, Hitoshi Hata
  • Publication number: 20090162905
    Abstract: A partially purified product of a hyaluronic acid salt obtained from a culture of a microorganism capable of producing hyaluronic acid, preferably a microorganism belonging to the genus Streptcoccus, is brought into contact with a solution containing a salt and a hydrophilic organic solvent, thereby transferring to a liquid phase, impurities contained in said partially purified product such as proteins, nucleic acids, colorants, endotoxins and the like, and then isolating the hyaluronic acid salt as a precipitate.
    Type: Application
    Filed: June 7, 2007
    Publication date: June 25, 2009
    Inventors: Hideki Murata, Kazuo Fukuda
  • Patent number: 7327091
    Abstract: A light-emitting element driving apparatus includes a constant-current circuit and a control circuit. The constant-current circuit includes a plurality of constant-current sources that are connected in parallel with each other and are respectively connected in series to a light-emitting element to supply current to the light-emitting element. The constant-current sources arrange 1st to Nth (N is an integer not smaller than 2) constant-current blocks each including 1st to Mth (M is an integer not smaller than 2) constant-current sources. A current ratio among the 1st to Mth constant-current sources is substantially identical in all of the constant-current blocks.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: February 5, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuo Fukuda, Tsutomu Fujino
  • Publication number: 20080016443
    Abstract: A navigation device includes: a display monitor equipped with a touch panel with a display screen assuming a substantially rectangular shape; a display control unit that displays specific simple information over part of the display screen along a side of the display screen or in a corner of the display screen; and a touch position detection unit that detects a touch in a display area where the simple information is provided and then detects that a touch position of the touch has moved inward from an edge of the display screen. As the touch position detection unit detects that the touch position has moved, the display control unit displays at the display screen detailed information related to the simple information.
    Type: Application
    Filed: April 3, 2007
    Publication date: January 17, 2008
    Applicant: XANAVI INFORMATICS CORPORATION
    Inventors: Toshiaki Hiroshima, Kazuo Fukuda
  • Publication number: 20070152909
    Abstract: An LED device comprises first to N-th (N is an integer of 2 or more) LEDs each having one end connected to one another and having different emission colors, and first to N-th transistors each having one end connected to the other ends of the individual LEDs and the other end connected to one another. The first to N-th transistors configure a current mirror circuit. A drive current supplied from outside is distributed to the individual LEDs at a current ratio corresponding to a size ratio of the individual transistors.
    Type: Application
    Filed: January 5, 2006
    Publication date: July 5, 2007
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Kazuo Fukuda, Tsutomu Fujino, Masami Yasumoto, Mitsuhiro Omae
  • Publication number: 20060139267
    Abstract: A light-emitting element driving apparatus includes a constant-current circuit and a control circuit. The constant-current circuit includes a plurality of constant-current sources that are connected in parallel with each other and are respectively connected in series to a light-emitting element to supply current to the light-emitting element. The constant-current sources arrange 1st to Nth (N is an integer not smaller than 2) constant-current blocks each including 1st to Mth (M is an integer not smaller than 2) constant-current sources. A current ratio among the 1st to Mth constant-current sources is substantially identical in all of the constant-current blocks.
    Type: Application
    Filed: December 28, 2005
    Publication date: June 29, 2006
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Kazuo Fukuda, Tsutomu Fujino
  • Patent number: 6525799
    Abstract: A liquid crystal display device includes a pair of first and second transparent substrates having first and second transparent conductive films formed on opposing surfaces, with liquid crystal between the first and second transparent substrates. An airtight seal encapsulates the liquid crystal, and includes a conducting portion which electrically interconnects the transparent conductive films. The transparent conducive films have metal thin films deposited on respective surface portions, including the conducting portion. A driving circuit is connected to the metal thin films, to control the liquid crystal. Spacer members are mixed and generally evenly dispersed in the seal, for controlling the thickness of the seal, which comprises first spacer members mixed in the conducting portion, and second spacer members mixed in portions of the seal other than the conducting portion. The first spacer members have a particle diameter smaller than that of the second spacer members by a predetermined value X.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: February 25, 2003
    Assignee: Nanox Corporation
    Inventor: Kazuo Fukuda