Patents by Inventor Koichi Sakata

Koichi Sakata 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: 10103155
    Abstract: A semiconductor memory device according to an embodiment, includes a first semiconductor member, a second semiconductor member, an insulating member, a plurality of electrode films, a first electrode, and a second electrode. The first semiconductor member and the second semiconductor member are separated in a first direction and extending in a second direction. The second direction crosses the first direction. The insulating member is provided between the first semiconductor member and the second semiconductor member. The plurality of electrode films are arranged to be separated from each other along the second direction. Each of the electrode films surrounds the first semiconductor member, the second semiconductor member, and the insulating member when viewed from the second direction. The first electrode is provided between the first semiconductor member and the electrode film. The second electrode is provided between the second semiconductor member and the electrode film.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: October 16, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Kohei Sakaike, Toshiyuki Iwamoto, Tatsuya Kato, Keisuke Kikutani, Fumitaka Arai, Satoshi Nagashima, Koichi Sakata, Yuta Watanabe
  • Publication number: 20180267421
    Abstract: A carrier is provided including a core particle and a resin layer coating the surface of the core particle. The resin layer includes fine metal particles, and a detected metal element amount A obtained by X-ray photoelectron spectrometry of the surface of the carrier is in a range of 4.0 atomic %?A?20.0 atomic % and an average major-axis length B of the fine metal particle exposing from the resin layer is in a range of 100 nm?B?800 nm.
    Type: Application
    Filed: March 5, 2018
    Publication date: September 20, 2018
    Inventors: Mariko TAKII, Koichi SAKATA, Tohru SUGANUMA, Masahiro SEKI, Masashi NAGAYAMA, Toyoaki TANO, Kohsuke MIYAZAKI
  • Patent number: 10067438
    Abstract: Provided is an electrostatic latent image developing white toner, including: a white toner including at least a binder resin, a white pigment, and a release agent; and a magnetic carrier including at least a core material, and a coating layer coating the core material and made of a coating resin and conductive particles, wherein Ra of the magnetic carrier is in a range of from 0.50 ?m to 1.00 ?m, and a bulk density of the magnetic carrier is in a range of from 2.08 g/cm3 to 2.24 g/cm3.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 4, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Murasawa, Hiroshi Tohmatsu, Hitoshi Iwatsuki, Mariko Takii, Koichi Sakata, Hiroyuki Kishida, Toyoaki Tano, Kenichi Mashiko
  • Patent number: 10031434
    Abstract: A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 24, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Mariko Takii, Yoshihiro Murasawa, Takahiro Nakamura, Kei Niwayama, Haruki Murata, Masato Taikoji, Koichi Sakata
  • Patent number: 10025214
    Abstract: Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 ?m from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 ?·cm or less.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: July 17, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masashi Nagayama, Mariko Takii, Yoshihiro Murasawa, Haruki Murata, Kei Niwayama, Tohru Suganuma, Koichi Sakata, Saori Yamada, Shinya Nakagawa, Kohsuke Miyazaki
  • Publication number: 20180120724
    Abstract: A carrier including a resin layer including at least one kind of particles, wherein the at least one kind of the particles are particles of barium sulfate, wherein an amount of Ba detected is 0.3 atomic % or greater in a Ba analysis through X-ray photo-electron spectroscopy (XPS) of the carrier, and wherein circle-equivalent diameters of the particles of the barium sulfate are 400 nm or greater but 900 nm or smaller.
    Type: Application
    Filed: April 28, 2016
    Publication date: May 3, 2018
    Inventors: Koichi SAKATA, Tohru SUGANUMA, Shohichi SUGIMOTO, Hiroshi TOHMATSU, Hiroyuki KISHIDA, Kenichi MASHIKO, Toyoaki TANO
  • Patent number: 9946177
    Abstract: A carrier is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a resin, a conductive particle including tungsten tin oxide, and a chargeable filler.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: April 17, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Murasawa, Koichi Sakata, Masashi Nagayama, Toyoaki Tano, Hiroyuki Kishida
  • Publication number: 20180097011
    Abstract: A semiconductor memory device according to one embodiment, includes a first electrode film, a plurality of semiconductor members, and a charge storage member. The first electrode film includes three or more first portions and a second portion connecting the first portions to each other. The first portions extend in a first direction and are arranged along a second direction that intersects with the first direction. The plurality of semiconductor members are arranged along the first direction between the first portions and extending in a third direction. The third direction intersects with a plane containing the first direction and the second direction. The charge storage member is disposed between each of the semiconductor members and each of the first portions. The second portion is disposed between the semiconductor members.
    Type: Application
    Filed: November 21, 2017
    Publication date: April 5, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Koichi Sakata, Yuta Watanabe, Keisuke Kikutani, Satoshi Nagashima, Fumitaka Arai, Toshiyuki Iwamoto
  • Publication number: 20170361712
    Abstract: An electric vehicle includes: a motor configured to drive a wheel; a smoothing capacitor provided within a power supply circuit that supplies electric power to the motor; a processor configured to perform a discharge process when the electric vehicle crashes, the discharge process discharging the smoothing capacitor by controlling the power supply circuit; a power source connected to each of a plurality of electric loads including the processor via a corresponding fuse; a relay circuit electrically connected between the power source and the processor and configured to be driven to electrically connect between the power source and the processor in response to a relay drive signal outputted from the processor; and a holding circuit configured to temporarily hold the relay circuit in a driven state when the processor quits outputting the relay drive signal.
    Type: Application
    Filed: April 18, 2017
    Publication date: December 21, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro TERAO, Koichi SAKATA
  • Patent number: 9837434
    Abstract: A semiconductor memory device according to one embodiment, includes a first electrode film, a plurality of semiconductor members, and a charge storage member. The first electrode film includes three or more first portions and a second portion connecting the first portions to each other. The first portions extend in a first direction and are arranged along a second direction that intersects with the first direction. The plurality of semiconductor members are arranged along the first direction between the first portions and extending in a third direction. The third direction intersects with a plane containing the first direction and the second direction. The charge storage member is disposed between each of the semiconductor members and each of the first portions. The second portion is disposed between the semiconductor members.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: December 5, 2017
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Koichi Sakata, Yuta Watanabe, Keisuke Kikutani, Satoshi Nagashima, Fumitaka Arai, Toshiyuki Iwamoto
  • Publication number: 20170329247
    Abstract: Provided is an electrostatic latent image developing white toner, including: a white toner including at least a binder resin, a white pigment, and a release agent; and a magnetic carrier including at least a core material, and a coating layer coating the core material and made of a coating resin and conductive particles, wherein Ra of the magnetic carrier is in a range of from 0.50 ?m to 1.00 ?m, and a bulk density of the magnetic carrier is in a range of from 2.08 g/cm3 to 2.24 g/cm3.
    Type: Application
    Filed: September 29, 2015
    Publication date: November 16, 2017
    Inventors: Yoshihiro MURASAWA, Hiroshi TOHMATSU, Hitoshi IWATSUKI, Mariko TAKII, Koichi SAKATA, Hiroyuki KISHIDA, Toyoaki TANO, Kenichi MASHIKO
  • Publication number: 20170293234
    Abstract: A synthetic controlled variable is obtained by obtaining a synthetic quantity using measurement results of a first and a second measuring instruments and corresponding gains (or transfer function) and synthesizing the synthetic quantity and one of the measurement results of the first and the second measuring instruments, respectively, via a high pass filter and a low pass filter. A feedback control system is structured that obtains a control input using a synthetic controlled variable and a desired value, and gives a plant the control input. This makes adding of a high pass filter for removing offset of installation position of the first and the second measuring instruments no longer necessary, and allows a driving system which controls robust driving in a high bandwidth of a plate stage regardless of bandwidth in which resonance appears to be designed.
    Type: Application
    Filed: June 22, 2017
    Publication date: October 12, 2017
    Applicant: NIKON CORPORATION
    Inventors: Koichi SAKATA, Hiroyoshi ASAUMI
  • Publication number: 20170263615
    Abstract: A semiconductor memory device according to an embodiment, includes a first semiconductor member, a second semiconductor member, an insulating member, a plurality of electrode films, a first electrode, and a second electrode. The first semiconductor member and the second semiconductor member are separated in a first direction and extending in a second direction. The second direction crosses the first direction. The insulating member is provided between the first semiconductor member and the second semiconductor member. The plurality of electrode films are arranged to be separated from each other along the second direction. Each of the electrode films surrounds the first semiconductor member, the second semiconductor member, and the insulating member when viewed from the second direction. The first electrode is provided between the first semiconductor member and the electrode film. The second electrode is provided between the second semiconductor member and the electrode film.
    Type: Application
    Filed: March 3, 2017
    Publication date: September 14, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kohei SAKAIKE, Toshiyuki IWAMOTO, Tatsuya KATO, Keisuke KlKUTANI, Fumitaka ARAI, Satoshi NAGASHIMA, Koichi SAKATA, Yuta WATANABE
  • Publication number: 20170263637
    Abstract: A semiconductor memory device according to one embodiment, includes a first electrode film, a plurality of semiconductor members, and a charge storage member. The first electrode film includes three or more first portions and a second portion connecting the first portions to each other. The first portions extend in a first direction and are arranged along a second direction that intersects with the first direction. The plurality of semiconductor members are arranged along the first direction between the first portions and extending in a third direction. The third direction intersects with a plane containing the first direction and the second direction. The charge storage member is disposed between each of the semiconductor members and each of the first portions. The second portion is disposed between the semiconductor members.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 14, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Koichi SAKATA, Yuta WATANABE, Keisuke KlKUTANI, Satoshi NAGASHIMA, Fumitaka ARAI, Toshiyuki IWAMOTO
  • Publication number: 20170248871
    Abstract: A developing device, including: a developer containing toner and carrier; and developer bearer configured to have surface thereof bear the developer and endlessly move, and to develop latent image over surface of latent image bearer by supplying toner in developer to latent image in developing region facing the latent image bearer, wherein carrier contains fine particles, value X in volume resistivity R (=10X) (?·cm) of carrier is 11.5-16.0, developer bearer includes: magnetic field generating unit including a plurality of magnetic poles; and developing sleeve having a cylindrical shape enclosing magnetic field generating unit, and configured to bear developer over outer circumferential surface of cylindrical shape by magnetic force of the magnetic field generating unit and perform surface moving by rotating relative to developing device body, and developing device includes developing sleeve voltage applying unit configured to apply AC component-containing voltage to developing sleeve.
    Type: Application
    Filed: August 31, 2015
    Publication date: August 31, 2017
    Inventors: Hitoshi IWATSUKI, Koichi SAKATA, Hiroshi TOHMATSU, Toyoaki TANO, Kenichi MASHIKO, Mariko TAKII, Hiroyuki KISHIDA, Yoshihiro MURASAWA, Keinosuke KONDOH, Toshio KOIKE, Yutaka TAKAHASHI
  • Patent number: 9720335
    Abstract: A synthetic controlled variable is obtained by obtaining a synthetic quantity using measurement results of a first and a second measuring instruments and corresponding gains (or transfer function) and synthesizing the synthetic quantity and one of the measurement results of the first and the second measuring instruments, respectively, via a high pass filter and a low pass filter. A feedback control system is structured that obtains a control input using a synthetic controlled variable and a desired value, and gives a plant the control input. This makes adding of a high pass filter for removing offset of installation position of the first and the second measuring instruments no longer necessary, and allows a driving system which controls robust driving in a high bandwidth of a plate stage regardless of bandwidth in which resonance appears to be designed.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: August 1, 2017
    Assignee: NIKON CORPORATION
    Inventors: Koichi Sakata, Hiroyoshi Asaumi
  • Publication number: 20170205721
    Abstract: A carrier is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a resin, a conductive particle including tungsten tin oxide, and a chargeable filler.
    Type: Application
    Filed: January 3, 2017
    Publication date: July 20, 2017
    Inventors: Yoshihiro MURASAWA, Koichi SAKATA, Masashi NAGAYAMA, Toyoaki TANO, Hiroyuki KISHIDA
  • Publication number: 20170185000
    Abstract: Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 ?m from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 ?·cm or less.
    Type: Application
    Filed: December 28, 2016
    Publication date: June 29, 2017
    Inventors: Masashi NAGAYAMA, Mariko TAKll, Yoshihiro MURASAWA, Haruki MURATA, Kei NIWAYAMA, Tohru SUGANUMA, Koichi SAKATA, Saori YAMADA, Shinya NAKAGAWA, Kohsuke MIYAZAKI
  • Patent number: 9601984
    Abstract: A power converter includes a backup power source Eb provided separately from a power source Es and designed to supply power during a discharge period, and a discharging driver Mb that turns on/off an upper-arm (one) switching element in series-connected switching elements Qu and Qd based on a drive signal that has at least one of a voltage and a frequency, and drives a lower-arm (the other) switching element Qd such that it is always on, the at least one of the voltage and the frequency of the drive signal being within a predetermined range lower than a drive signal outputted from a normal driver Mu, Md.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: March 21, 2017
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiyuki Hamanaka, Tsuneo Maebara, Koichi Sakata
  • Publication number: 20160363880
    Abstract: A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 15, 2016
    Inventors: Mariko TAKII, Yoshihiro MURASAWA, Takahiro NAKAMURA, Kei NIWAYAMA, Haruki MURATA, Masato TAIKOJI, Koichi SAKATA