Patents by Inventor Akira Yamazaki

Akira Yamazaki 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: 9679673
    Abstract: A conductive composition according to the present invention contains a conductive polymer (A) having a sulfonic acid group and/or a carboxyl group; and an alkali metal hydroxide and/or an alkaline earth metal hydroxide (B). In such a conductive composition, the amount of the hydroxide (B) is set at 0.2˜0.65 mol per 1 mol of a repeating unit that contains a sulfonic acid group and/or a carboxyl group in the conductive polymer (A).
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: June 13, 2017
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kohei Yamada, Takahiro Sakai, Masashi Uzawa, Youko Sasata, Akira Yamazaki
  • Publication number: 20170155508
    Abstract: Provided is a cryptographic communication system including a first semiconductor device and a second semiconductor device. The first semiconductor device includes a common key generation unit that generates a common key CK(a) by using a unique code UC(a) and correction data CD(a), and an encryption unit that encrypts the common key CK(a) generated in the common key generation unit by using a public key PK(b) of the second semiconductor device. The second semiconductor device includes a secret key generation unit that generates a secret key SK(b) by using a unique code UC(b) and correction data CD(b), and a decryption unit that decrypts the common key CK(a) encrypted in the encryption unit by using the secret key SK(b).
    Type: Application
    Filed: February 14, 2017
    Publication date: June 1, 2017
    Inventors: Shigemasa Shiota, Shigeru Furuta, Masayuki Hirokawa, Akira Yamazaki, Daisuke Oshida
  • Publication number: 20170127703
    Abstract: Provided is an innovative method for sterilization or inactivation treatment of heat-resistant spore-forming bacteria that demonstrates a sufficient sterilization effect in a reliable manner and that can be implemented using simple equipment by reducing the heat resistance of heat-resistant spore-forming bacteria by the effect of decompression treatment in a high-pressure process, and by carrying out a heat sterilization treatment after a predetermined resting time has elapsed after the decompression to thereby sterilize and inactivate heat-resistant bacteria that have reduced heat resistance. A method for sterilizing or inactivating heat-resistant spore-forming bacteria by performing, as a pretreatment of a heat sterilization treatment, a high-pressure treatment in which a hydrostatic pressure of 50 MPa or more and 200 MPa or less is applied to an object under a temperature of 50° C.
    Type: Application
    Filed: August 19, 2014
    Publication date: May 11, 2017
    Applicant: ECHIGOSEIKA CO., LTD.
    Inventors: Miyuki OGINO, Tadayuki NISHIUMI, Atsushi KOBAYASHI, Akira YAMAZAKI, Eri OHARA, Mariko KAWAMURA, Jun HOSHINO
  • Patent number: 9647569
    Abstract: A matrix convertor includes a power convertor and a controller. The power convertor includes a plurality of bidirectional switches disposed between a plurality of input phases and a plurality of output phases. The controller is configured to generate a control command and control the power convertor based on the control command. The control command includes a switching pattern that causes a first input phase among the input phases to be connected to one output phase among the output phases and that causes connection of the input phases to be switched between a rest of the output phases. In generating the control command, the controller is configured to set a lower limit to a period of time during which a second input phase among the input phases that corresponds to an intermediate voltage is connected to the rest of the output phases.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: May 9, 2017
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Akira Yamazaki
  • Patent number: 9627144
    Abstract: A solid electrolytic capacitor, including: a solid electrolytic layer; and a dielectric layer on which the solid electrolytic layer is formed. The solid electrolytic layer is formed by applying and drying a conductive-polymer solution including a conductive polymer on the dielectric layer, and the dielectric layer is formed by oxidizing a surface of an anode metal. The conductive polymer has a volume average particle size of smaller than 26 nm. A stacked aluminum electrolytic capacitor including a test solid electrolytic layer and a test dielectric layer, the test solid electrolytic layer being formed by applying and drying the conductive-polymer solution on the test dielectric layer, the test dielectric layer being formed by oxidizing a surface of aluminum having an electrical capacitance of 95 ?F/cm2, has a rate of exhibited capacitance of no less than 70%.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: April 18, 2017
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Akira Yamazaki, Takeo Sando, Masashi Uzawa, Hiroaki Iriyama
  • Patent number: 9608818
    Abstract: Provided is a cryptographic communication system including a first semiconductor device and a second semiconductor device. The first semiconductor device includes a common key generation unit that generates a common key CK(a) by using a unique code UC(a) and correction data CD(a), and an encryption unit that encrypts the common key CK(a) generated in the common key generation unit by using a public key PK(b) of the second semiconductor device. The second semiconductor device includes a secret key generation unit that generates a secret key SK(b) by using a unique code UC(b) and correction data CD(b), and a decryption unit that decrypts the common key CK(a) encrypted in the encryption unit by using the secret key SK(b).
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: March 28, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Shigemasa Shiota, Shigeru Furuta, Masayuki Hirokawa, Akira Yamazaki, Daisuke Oshida
  • Patent number: 9571685
    Abstract: An image reading device includes a reading member that reads an image of a document at a reading position that is set in a transport path of the document, a skew detector that detects an amount of skew of the document with respect to a transport direction of the document, a distortion detector that detects an amount of distortion in the document that has been read, the amount of distortion being a deviation, from a right angle, of an angle formed by a direction transverse to the transport direction of the document with the transport direction of the document, and an image correcting unit that rotates the image that has been read, in accordance with an amount that cancels the amount of skew detected by the skew detector, and corrects distortion of the read image in accordance with an amount that cancels the amount of distortion.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: February 14, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Akira Yamazaki
  • Patent number: 9543851
    Abstract: A matrix converter includes: a power converter configured to couple an AC power supply and a load together; and a controller configured to selectively execute: a first control mode in which the controller is configured to perform power conversion between the AC power supply and the load; and a second control mode in which the controller is configured to directly combine the AC power supply with the load. The controller is configured to: increase the output voltage and cause a phase of the output voltage follow up a voltage phase of the AC power supply in a case where a difference between a frequency of an output voltage from the power converter to the load and a frequency of the AC power supply becomes within a predetermined range.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: January 10, 2017
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Joji Ebisu, Akira Yamazaki
  • Patent number: 9543875
    Abstract: A motor control device is provided, which includes a power converter for applying output voltage according to a voltage command to an electric motor, a magnetic flux estimator for estimating a vector of stator magnetic flux of the electric motor based on a difference between the output voltage and a voltage drop caused by a coil resistance of the electric motor, and a phase estimator for estimating a phase of the stator magnetic flux based on the vector of the stator magnetic flux estimated by the magnetic flux estimator. The magnetic flux estimator includes a variable low-pass filter for applying a low-pass filter to the difference at a cut-off frequency according to a frequency of the output voltage, and a phase adjuster for retarding at least one of an output phase of the variable low-pass filter and a phase of the difference before inputted into the variable low-pass filter.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: January 10, 2017
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Akira Yamazaki, Shingo Fukumaru
  • Publication number: 20160373043
    Abstract: A motor controller includes a driver, a current detector, and a command generator. The driver is configured to drive a power converter based on a flux command on which an exploration signal is superimposed. The current detector is configured to detect an output current output from the power converter that has been driven by the driver. The command generator is configured to generate the flux command so as to reduce a current component, among current components included in the output current detected by the current detector, that corresponds to the exploration signal.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 22, 2016
    Applicant: Kabushiki Kaisha Yaskawa Denki
    Inventor: Akira YAMAZAKI
  • Publication number: 20160342358
    Abstract: A storage control apparatus includes a memory and a processor. The memory stores selection condition information relating to a selection condition for storage devices to construct a RAID, group information relating to groups to which the storage devices belong, and connection information indicating a connection configuration of the storage devices. The processor is configured to perform a procedure including: selecting the storage devices that match the selection condition information; extracting groups to which the selected storage devices belong based on the group information; assigning group priorities, which indicate selection priorities in units of the groups of the storage devices, to the extracted groups based on the connection information; and selecting one storage device from each of the extracted groups in accordance with the group priorities until a predetermined number of storage devices have been selected.
    Type: Application
    Filed: April 26, 2016
    Publication date: November 24, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Atsuhiro Otaka, Akiko Sakaguchi, Hidetoshi SATOU, Takahiro YUMOTO, Akira YAMAZAKI
  • Publication number: 20160312737
    Abstract: An engine-driven working machine includes a controller, which varies a control value of a solenoid valve so as to decrease or increase an opening degree of the solenoid valve when a rotating speed of an engine is within a predetermined high rotating speed range and the rotating speed of the engine is lower or higher than a predetermined rotating speed, respectively. When the control value of the solenoid valve is varied so as to decrease the opening degree of the solenoid valve and corresponds to a predetermined opening degree larger than a fully-closed state, the control value is set to a limitation value.
    Type: Application
    Filed: April 20, 2016
    Publication date: October 27, 2016
    Inventors: Shiro YAMAGUCHI, Takamasa OTSUJI, Kosuke MATSUMOTO, Hiroyuki MIYAKI, Akira YAMAZAKI
  • Publication number: 20160312692
    Abstract: An engine-driven working machine includes a controller, which varies a control value of a solenoid valve so as to decrease or increase an opening degree of the solenoid valve when a rotating speed of an engine is within a predetermined high rotating speed range and the rotating speed of the engine is lower or higher than a predetermined rotating speed, respectively. In case the controller determines that the engine-driven working machine gets started saw cutting, the controller stops varying the control value of the solenoid valve when the rotating speed of the engine is within the predetermined high rotating speed range and lower than the target rotating speed.
    Type: Application
    Filed: April 20, 2016
    Publication date: October 27, 2016
    Inventors: Takamasa OTSUJI, Shiro YAMAGUCHI, Kosuke MATSUMOTO, Hiroyuki MIYAKI, Akira YAMAZAKI
  • Publication number: 20160291803
    Abstract: An information processing apparatus includes a storage unit, a control unit, and a display control unit. The storage unit stores relation information. The control unit compares first information with second information, and determines whether or not to update the second information. The control unit, when having determined to update the second information, updates the second information based on the first information and the relation information to generate update information. The control unit notifies the display control unit of the update information.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 6, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Akira YAMAZAKI, Takahiro YUMOTO
  • Publication number: 20160277611
    Abstract: An image reading device includes a reading member that reads an image of a document at a reading position that is set in a transport path of the document, a skew detector that detects an amount of skew of the document with respect to a transport direction of the document, a distortion detector that detects an amount of distortion in the document that has been read, the amount of distortion being a deviation, from a right angle, of an angle formed by a direction transverse to the transport direction of the document with the transport direction of the document, and an image correcting unit that rotates the image that has been read, in accordance with an amount that cancels the amount of skew detected by the skew detector, and corrects distortion of the read image in accordance with an amount that cancels the amount of distortion.
    Type: Application
    Filed: July 29, 2015
    Publication date: September 22, 2016
    Inventor: Akira YAMAZAKI
  • Patent number: 9438750
    Abstract: An image reading device includes a transport path along which a medium having an image recorded thereon is transported; a light source member that radiates light onto the medium passing a predetermined read position in the transport path; a reading member that receives light from the read position and reads the image on the medium; a detecting member that is disposed in the transport path and that detects the medium; and a notifying member that notifies a user that the medium is jammed based on a detection result of the detecting member. The light source member is turned on when the medium is jammed based on the detection result of the detecting member.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: September 6, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Akira Yamazaki, Shiro Yamahashi
  • Publication number: 20160212278
    Abstract: An image reading device includes a transport path along which a medium having an image recorded thereon is transported; a light source member that radiates light onto the medium passing a predetermined read position in the transport path; a reading member that receives light from the read position and reads the image on the medium; a detecting member that is disposed in the transport path and that detects the medium; and a notifying member that notifies a user that the medium is jammed based on a detection result of the detecting member. The light source member is turned on when the medium is jammed based on the detection result of the detecting member.
    Type: Application
    Filed: August 5, 2015
    Publication date: July 21, 2016
    Inventors: Akira YAMAZAKI, Shiro YAMAHASHI
  • Publication number: 20160190970
    Abstract: A power convertor includes a power conversion unit, a PWM controller, and a frequency changer. The power conversion unit includes a plurality of switching elements. The PWM controller is configured to perform PWM control of the plurality of switching elements. The frequency changer is configured to change a carrier frequency in the PWM control. The frequency changer includes an outputter, an integrator, and a frequency determiner. The outputter is configured to output a control value in accordance with a control deviation with respect to a control target. The integrator is configured to integrate the control value output from the outputter. The frequency determiner is configured to determine the carrier frequency based on an integral value obtained by the integrator.
    Type: Application
    Filed: December 24, 2015
    Publication date: June 30, 2016
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Akira Yamazaki, Yoichi Yano
  • Patent number: 9363399
    Abstract: An image reading device includes: a supplying tray on which a document is placed; a document conveyer that successively conveys the document placed on the supplying tray toward a reading position; a plurality of detection sensors that are disposed in a plurality of positions in a width direction intersecting a conveyance direction of the document, and detect a front edge of the document in the conveyance direction when the document is placed on the supplying tray; and a document reading portion that reads an image on the document passing the reading position, and generates an image signal.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: June 7, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi Mabara, Keisuke Uchiyama, Akira Yamazaki, Kazuyuki Koda
  • Patent number: 9363082
    Abstract: Provided is a cryptographic communication system including a first semiconductor device and a second semiconductor device. The first semiconductor device includes a common key generation unit that generates a common key CK(a) by using a unique code UC(a) and correction data CD(a), and an encryption unit that encrypts the common key CK(a) generated in the common key generation unit by using a public key PK(b) of the second semiconductor device. The second semiconductor device includes a secret key generation unit that generates a secret key SK(b) by using a unique code UC(b) and correction data CD(b), and a decryption unit that decrypts the common key CK(a) encrypted in the encryption unit by using the secret key SK(b).
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: June 7, 2016
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Shigemasa Shiota, Shigeru Furuta, Masayuki Hirokawa, Akira Yamazaki, Daisuke Oshida