Patents by Inventor Ryo Takenaka

Ryo Takenaka 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: 20240088841
    Abstract: A radio frequency circuit includes carrier amplifiers and peak amplifiers, transformers, a signal output terminal connected to a first end of an output-side coil, an LC series circuit, and a capacitor. An input-side coil is connected, at its first end, to the carrier amplifier, and is connected, at its second end, to the carrier amplifier. An input-side coil is connected, at its first end, to the peak amplifier, and is connected, at its second end, to the peak amplifier. The LC series circuit is connected between the peak amplifier and the ground. The capacitor is connected to a second end of the output-side coil and a first end of an output-side coil. The output-side coil is connected, at its second end, to the ground.
    Type: Application
    Filed: November 24, 2023
    Publication date: March 14, 2024
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kenji TAHARA, Yoshiaki SUKEMORI, Kae YAMAMOTO, Ryo WAKABAYASHI, Isao TAKENAKA
  • Patent number: 11725193
    Abstract: [Problem] To provide a glucose dehydrogenase with high thermal stability to be used in blood sugar measurement. [Solution to Problem to problem] A modified glucose dehydrogenase with an excellent property of high thermal stability that can be obtained by modifying some of amino acids constituting a protein such as a wild-type glucose dehydrogenase, a polynucleotide encoding the enzyme, a method for manufacturing the enzyme, a method for measuring glucose using the enzyme, a measuring reagent composition and a biosensor, and methods for manufacturing the measuring reagent composition and the biosensor.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: August 15, 2023
    Assignee: IKEDA FOOD RESEARCH CO., LTD.
    Inventors: Michinari Honda, Hirokazu Sanada, Ryo Takenaka, Takafumi Takumi, Takahiro Fujii
  • Publication number: 20220098557
    Abstract: [Problem] To provide a glucose dehydrogenase with high thermal stability to be used in blood sugar measurement. [Solution to Problem to problem] A modified glucose dehydrogenase with an excellent property of high thermal stability that can be obtained by modifying some of amino acids constituting a protein such as a wild-type glucose dehydrogenase, a polynucleotide encoding the enzyme, a method for manufacturing the enzyme, a method for measuring glucose using the enzyme, a measuring reagent composition and a biosensor, and methods for manufacturing the measuring reagent composition and the biosensor.
    Type: Application
    Filed: May 25, 2018
    Publication date: March 31, 2022
    Applicant: IKEDA FOOD RESEARCH CO., LTD.
    Inventors: Michinari HONDA, Hirokazu SANADA, Ryo TAKENAKA, Takafumi TAKUMI, Takahiro FUJII
  • Publication number: 20210238562
    Abstract: The present invention addresses the problem of providing: a glucose dehydrogenase; a polynucleotide encoding the enzyme; a method for producing the enzyme; a method for measuring glucose using the enzyme; a measurement reagent composition; and a biosensor. The present invention pertains to a protein that has any of amino acid sequences (a), (b) and (c) and has a glucose dehydrogenase activity, etc.: (a) an amino acid sequence represented by SEQ ID NO: 3, 6, 15 or 16; (b) an amino acid sequence derived from the amino acid sequence represented by SEQ ID NO: 3, 6, 15 or 16 by deleting, substituting or adding 1-3 amino acids; and (c) an amino acid sequence having 90% or more identity to the amino acid sequence represented by SEQ ID NO: 3 or 15 or 85% or more identity to the amino acid sequence represented by SEQ ID NO: 6 or 16.
    Type: Application
    Filed: April 15, 2019
    Publication date: August 5, 2021
    Applicant: IKEDA FOOD RESEARCH CO., LTD.
    Inventors: Takafumi TAKUMI, Emi WATANABE, Ryo TAKENAKA, Hirokazu SANADA, Michinari HONDA
  • Patent number: 10961514
    Abstract: The present invention relates to a protein having glucose dehydrogenase activity selected from: (a) an amino acid sequence represented by SEQ ID NO: 3; (b) an amino acid sequence in which 1 to 3 amino acids are deleted from, replaced in or added to the amino acid sequence represented by SEQ ID NO: 3; (c) an amino acid sequence which has at least 80% identity with the amino acid sequence represented by SEQ ID NO: 3 and whose N-terminus is SS; or (d) an amino acid sequence which has at least 80% identity with the amino acid sequence represented by SEQ ID NO: 3, and does not contain a sequence represented by SEQ ID NO: 8 at its N-terminus. The invention also includes a polynucleotide encoding the enzyme, a method for manufacturing the enzyme, a method for measuring glucose using the enzyme, a measuring reagent composition and a biosensor.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: March 30, 2021
    Assignee: IKEDA FOOD RESEARCH CO., LTD.
    Inventors: Ryo Takenaka, Takafumi Takumi
  • Patent number: 10386774
    Abstract: A sheet stacker includes a sheet stack table on which a sheet is stacked and a sheet reversing section disposed above the sheet stack table. The sheet reversing section defines a sheet reverse passage to reverse a direction of conveyance of a sheet fed to the sheet reversing section. The sheet reversing section includes a first sheet guide to guide a bottom face of the sheet and a second sheet guide disposed downstream from the first sheet guide in a sheet conveyance direction in which the sheet is fed to the sheet reversing section. The second sheet guide to guide the bottom face of the sheet is attachable to and removable from an apparatus body.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: August 20, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tadayasu Enomoto, Ryo Takenaka, Daikai Zaitsu
  • Publication number: 20190024057
    Abstract: The present invention relates to a protein having glucose dehydrogenase activity selected from:(a) an amino acid sequence represented by SEQ ID NO: 3; (b) an amino acid sequence in which 1 to 3 amino acids are deleted from, replaced in or added to the amino acid sequence represented by SEQ ID NO: 3;(c) an amino acid sequence which has at least 80% identity with the amino acid sequence represented by SEQ ID NO: 3 and whose N-terminus is SS; or(d) an amino acid sequence which has at least 80% identity with the amino acid sequence represented by SEQ ID NO: 3, and does not contain a sequence represented by SEQ ID NO: 8 at its N-terminus. The invention also includes a polynucleotide encoding the enzyme, a method for manufacturing the enzyme, a method for measuring glucose using the enzyme, a measuring reagent composition and a biosensor.
    Type: Application
    Filed: January 11, 2017
    Publication date: January 24, 2019
    Applicant: IKEDA FOOD RESEARCH CO., LTD.
    Inventors: Ryo TAKENAKA, Takafumi TAKUMI
  • Publication number: 20170255155
    Abstract: A sheet stacker includes a sheet stack table on which a sheet is stacked and a sheet reversing section disposed above the sheet stack table. The sheet reversing section defines a sheet reverse passage to reverse a direction of conveyance of a sheet fed to the sheet reversing section. The sheet reversing section includes a first sheet guide to guide a bottom face of the sheet and a second sheet guide disposed downstream from the first sheet guide in a sheet conveyance direction in which the sheet is fed to the sheet reversing section. The second sheet guide to guide the bottom face of the sheet is attachable to and removable from an apparatus body.
    Type: Application
    Filed: February 9, 2017
    Publication date: September 7, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tadayasu ENOMOTO, Ryo TAKENAKA, Daikai ZAITSU
  • Patent number: 9695002
    Abstract: A sheet feeder control method for controlling a sheet feeder of an image forming apparatus includes feeding a sheet through a sheet feed path exposable to the exterior of the sheet feeder, detecting the feeding of the sheet at at least a first position on the sheet feed path, discharging the fed sheet to the exterior of the sheet feeder, detecting the discharge of the sheet at a second position downstream of the first position in a sheet feeding direction, detecting a sheet jam during the feeding and discharging of the sheet, and if the jammed sheet is detected at the second position but not at the first position, cancelling a malfunction state due to the sheet jam when the sheet stops being detected at the second position, irrespective of whether the sheet feed path is covered or exposed.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: July 4, 2017
    Assignee: Ricoh Company, Ltd.
    Inventor: Ryo Takenaka
  • Patent number: 9499363
    Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: November 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuu Wakabayashi, Ryo Takenaka, Masashi Satoh, Shingo Nishizaki, Yusuke Ozaki, Yuji Ikeda, Hiroshi Okamura, Naohiro Funada, Tomohide Kondoh
  • Publication number: 20150152394
    Abstract: The purpose of the invention is to provide flavin-conjugated glucose dehydrogenase having little variation in activity in the typical biosensor measurement temperature range (10-40° C.) and a method for measuring glucose using same. The present invention relates to flavin-conjugated glucose dehydrogenase having the following properties (1)-(3) and the like: (1) action: shows glucose dehydrogenase activity in the presence of an electron acceptor; (2) substrate specificity: the activity value is 10% or less relative to maltose, D-galactose, D-fructose, sorbitol, lactose, and sucrose when the activity value relative to D-glucose is taken to be 100%; and (3) temperature characteristics: the range of the activity value at 10-40° C. is 20-150% when the activity value at 30° C. is taken to be 100%.
    Type: Application
    Filed: March 29, 2013
    Publication date: June 4, 2015
    Inventors: Michinari Honda, Ryo Takenaka, Takafumi Takumi
  • Publication number: 20150125165
    Abstract: A sheet feeder control method for controlling a sheet feeder of an image forming apparatus includes feeding a sheet through a sheet feed path exposable to the exterior of the sheet feeder, detecting the feeding of the sheet at at least a first position on the sheet feed path, discharging the fed sheet to the exterior of the sheet feeder, detecting the discharge of the sheet at a second position downstream of the first position in a sheet feeding direction, detecting a sheet jam during the feeding and discharging of the sheet, and if the jammed sheet is detected at the second position but not at the first position, cancelling a malfunction state due to the sheet jam when the sheet stops being detected at the second position, irrespective of whether the sheet feed path is covered or exposed.
    Type: Application
    Filed: January 15, 2015
    Publication date: May 7, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventor: Ryo TAKENAKA
  • Publication number: 20150108714
    Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.
    Type: Application
    Filed: December 31, 2014
    Publication date: April 23, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yuu WAKABAYASHI, Ryo TAKENAKA, Masashi SATOH, Shingo NISHIZAKI, Yusuke OZAKI, Yuji IKEDA, Hiroshi OKAMURA, Naohiro FUNADA, Tomohide KONDOH
  • Patent number: 8970858
    Abstract: An operator guidance system includes a detection unit, a control unit, and an operation indicator. The detection unit is disposed in an image forming apparatus to output a combination of detection signals, and includes one or more media sensors, and one or more opening sensors. The one or more media sensors are disposed along a media conveyance path to output a media detection signal. The one or more opening sensors are disposed adjacent to an openable structure to output an opening detection signal. The control unit is connected to the detection unit to determine guidance to be provided to an operator based on the combination of detection signals, and includes a memory and a controller. The operation indicator is connected to the control unit to indicate the identified operation to the operator.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: March 3, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Mami Akiyama, Yasuhiro Sagawa, Masaharu Furuya, Manabu Izumikawa, Mikio Ishibashi, Yoshio Hattori, So Ohta, Ryo Takenaka, Hiroaki Murakami
  • Patent number: 8969025
    Abstract: The problem to be resolved is to provide an electron mediator and a fusion body with high affinity with an enzyme, a measuring method using extracellular secretion type cytochrome and an enzyme, an electrode, and a sensor. The present invention relates to an electron mediator for glucose oxidoreductase comprising extracellular secretion type cytochrome, a fusion body in which the electron mediator is fused with glucose oxidoreductase, a composition for glucose measurement including the electron mediator or fusion body, a gene encoding a new extracellular secretion type cytochrome, and a measurement method using extracellular secretion type cytochrome and an enzyme, an electrode, and a sensor.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: March 3, 2015
    Assignee: Panasonic Healthcare Holdings Co., Ltd.
    Inventors: Ryo Takenaka, Michinari Honda, Hironori Omura
  • Patent number: 8960672
    Abstract: A sheet feeder control method for controlling a sheet feeder of an image forming apparatus includes feeding a sheet through a sheet feed path exposable to the exterior of the sheet feeder, detecting the feeding of the sheet at at least a first position on the sheet feed path, discharging the fed sheet to the exterior of the sheet feeder, detecting the discharge of the sheet at a second position downstream of the first position in a sheet feeding direction, detecting a sheet jam during the feeding and discharging of the sheet, and if the jammed sheet is detected at the second position but not at the first position, cancelling a malfunction state due to the sheet jam when the sheet stops being detected at the second position, irrespective of whether the sheet feed path is covered or exposed.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: February 24, 2015
    Assignee: Ricoh Company
    Inventor: Ryo Takenaka
  • Patent number: 8950750
    Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: February 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuu Wakabayashi, Ryo Takenaka, Masashi Satoh, Shingo Nishizaki, Yusuke Ozaki, Yuji Ikeda, Hiroshi Okamura, Naohiro Funada, Tomohide Kondoh
  • Patent number: 8945359
    Abstract: The invention provides a flavin-binding glucose dehydrogenase exhibiting reduced fluctuation of activity depending on temperature environment, and a method for measuring glucose concentration using the flavin-binding glucose dehydrogenase. The flavin-binding glucose dehydrogenase has the following properties (1) to (3): (1) activity: which exhibits glucose dehydrogenase activity in the presence of an electron acceptor; (2) substrate specificity: which exhibits an activity of 10% or less against maltose, D-galactose, D-fructose, sorbitol, lactose and sucrose when the activity against D-glucose is defined as 100%; and (3) temperature characteristics: which exhibits lower fluctuation of activity in a wide temperature range of 10 to 50° C.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: February 3, 2015
    Assignee: Ikeda Food Research Co., Ltd.
    Inventors: Michinari Honda, Sayaka Taki, Ryo Takenaka
  • Patent number: 8794626
    Abstract: A sheet thickness detecting device for detecting a thickness of a sheet includes a fixed roller rotatably supported by a shaft so that the fixed roller faces the sheet; a movable roller rotatably provided so that the movable roller and the fixed roller sandwich and feed the sheet, and configured to be displaced in accordance with the thickness of the sandwiched sheet; a swing member rotatably supporting the movable roller and including a shaft so that the swing member is swung around the shaft, wherein the swing member further includes a detection target part formed in a manner that a distance between the detection target part and the shaft is greater than that between a position where the movable roller is supported by the swing member and the shaft; and a detecting unit detecting the displacement amount of the detection target part of the swing member.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: August 5, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryo Takenaka, Shingo Nishizaki, Yusuke Ozaki, Masashi Satoh, Hiroshi Adachi, Hiroshi Okamura, Naohiro Funada, Yuji Ikeda
  • Publication number: 20140183811
    Abstract: A sheet feeder control method for controlling a sheet feeder of an image forming apparatus includes feeding a sheet through a sheet feed path exposable to the exterior of the sheet feeder, detecting the feeding of the sheet at at least a first position on the sheet feed path, discharging the fed sheet to the exterior of the sheet feeder, detecting the discharge of the sheet at a second position downstream of the first position in a sheet feeding direction, detecting a sheet jam during the feeding and discharging of the sheet, and if the jammed sheet is detected at the second position but not at the first position, cancelling a malfunction state due to the sheet jam when the sheet stops being detected at the second position, irrespective of whether the sheet feed path is covered or exposed.
    Type: Application
    Filed: December 3, 2013
    Publication date: July 3, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventor: Ryo TAKENAKA