Patents by Inventor Keizo Kato
Keizo Kato 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).
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Publication number: 20140146393Abstract: There is provided is a transmitted light control device capable of controlling a peak wavelength and a peak intensity of transmitted light while keeping a sharp wavelength width. A transmitted light control device 10 includes: a grating substrate 1; a metal thin film 2; a conducting polymer layer 3 made by depositing a conducting polymer on the metal thin film 2; a cell 4 filled with a liquid medium 5 composed of an electrolyte or a buffer solution and configured such that a part of the liquid medium 5 is in contact with the conducting polymer layer 3; and a metal thin film potential control means 6 having a working electrode W connected to the metal thin film 2 and having a counter electrode C and a reference electrode R each connected to the liquid medium 5. The substrate 1 and at least a part of the cell 4 are made of a light transmitting material.Type: ApplicationFiled: June 11, 2012Publication date: May 29, 2014Applicant: NIIGATA UNIVESITYInventors: Akira Baba, Rapiphun Janmanee, Koji Tada, Kazunari Shinbo, Keizo Kato, Futao Kaneko
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Publication number: 20140133052Abstract: A magnetic read head having a reduced read gap and a stable magnetic pinned layer structure. The sensor includes a seed layer that has a surface formed with an anisotropic texture. A magnetic pinned layer formed over the seed layer has a body centered cubic structure which causes the pinned layer structure to have a magnetic anisotropy with an easy axis oriented perpendicular to the air bearing surface when deposited over the textured seed layer. A magnetic free layer structure formed over the pinned layer structure and over a non-magnetic barrier layer has a face centered cubic structure which causes the magnetic free layer to have a magnetic anisotropy with an easy axis oriented parallel with the air bearing surface.Type: ApplicationFiled: November 14, 2012Publication date: May 15, 2014Applicant: HGST NETHERLANDS B.V.Inventors: Kenichi Meguro, Keizo Kato, Susumu Okamura, Nobuo Yoshida
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Patent number: 8564781Abstract: Provided is an SPR sensor which can achieve compaction and multichannel detection by simple configuration at a low cost. The SPR sensor comprises an optical path, and detection areas on the side surface thereof formed by laminating metal layers formed to cause surface plasmon resonance phenomenon. The SPR sensor is characterized in that two or more detection areas are formed for one optical path, a dielectric constant regulation layer is further laminated in at least one of the two or more detection areas, dielectric constant is regulated to have a different surface plasmon resonance in each detection area, and a dielectric constant regulation layer laminated in the at least one of the two or more detection areas functions as a layer exhibiting sensitivity to an object to be detected.Type: GrantFiled: August 21, 2009Date of Patent: October 22, 2013Assignees: Hitachi Chemical Company, Ltd., Niigata UniversityInventors: Nobuo Miyadera, Kenta Mizusawa, Kazunari Shinbo, Yasuo Ohdaira, Akira Baba, Keizo Kato, Futao Kaneko, Takahiro Kawakami
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Patent number: 8189304Abstract: A magnetoresistive magnetic head according to one embodiment uses a current-perpendicular-to-plane magnetoresistive element having a laminate of a free layer, an intermediate layer, and a pinned layer, the pinned layer being substantially fixed to a magnetic field to be detected, wherein either the pinned layer or the free layer includes a Heusler alloy layer represented by a composition of X—Y—Z, wherein X is between about 45 at. % and about 55 at. % and is Co or Fe, Y accounts for between about 20 at. % and about 30 at. % and is one or more elements selected from V, Cr, Mn, and Fe, and Z is between about 20 at. % and about 35 at.Type: GrantFiled: December 11, 2009Date of Patent: May 29, 2012Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Susumu Okamura, Yo Sato, Katsumi Hoshino, Hiroyuki Hoshiya, Kenichi Meguro, Keizo Kato
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Patent number: 8107193Abstract: According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole including a write magnetic pole layer for recording, the write magnetic pole layer comprising magnetic layers being antiferromagnetically coupled via a thin non-magnetic conductor layer between the magnetic layers, wherein the write magnetic pole layer for recording has a flare section which gradually widens in a height-wise direction of a throat height section. The main magnetic pole also includes a non-magnetic cap layer laminated above an uppermost layer of the write magnetic pole layer, the non-magnetic cap layer being textured to provide anisotropy, and a subsidiary magnetic pole layer for supplementing the recording laminated above the non-magnetic cap layer. The head also includes an auxiliary magnetic pole, a magnetic shield positioned via a non-magnetic layer on a trailing edge and both sides of the main magnetic pole in a track width direction, and a coil for generating a recording magnetic field.Type: GrantFiled: April 8, 2010Date of Patent: January 31, 2012Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Isao Nunokawa, Mikito Sugiyama, Kikuo Kusukawa, Keizo Kato
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Publication number: 20110249360Abstract: According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole including a write magnetic pole layer for recording, the write magnetic pole layer comprising magnetic layers being antiferromagnetically coupled via a thin non-magnetic conductor layer between the magnetic layers, wherein the write magnetic pole layer for recording has a flare section which gradually widens in a height-wise direction of a throat height section. The main magnetic pole also includes a non-magnetic cap layer laminated above an uppermost layer of the write magnetic pole layer, the non-magnetic cap layer being textured to provide anisotropy, and a subsidiary magnetic pole layer for supplementing the recording laminated above the non-magnetic cap layer. The head also includes an auxiliary magnetic pole, a magnetic shield positioned via a non-magnetic layer on a trailing edge and both sides of the main magnetic pole in a track width direction, and a coil for generating a recording magnetic field.Type: ApplicationFiled: April 8, 2010Publication date: October 13, 2011Inventors: Isao Nunokawa, Mikito Sugiyama, Kikuo Kusukawa, Keizo Kato
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Publication number: 20110157593Abstract: Provided is an SPR sensor which can achieve compaction and multichannel detection by simple configuration at a low cost. The SPR sensor comprises an optical path, and detection areas on the side surface thereof formed by laminating metal layers formed to cause surface plasmon resonance phenomenon. The SPR sensor is characterized in that two or more detection areas are formed for one optical path, a dielectric constant regulation layer is further laminated in at least one of the two or more detection areas, dielectric constant is regulated to have a different surface plasmon resonance in each detection area, and a dielectric constant regulation layer laminated in the at least one of the two or more detection areas functions as a layer exhibiting sensitivity to an object to be detected.Type: ApplicationFiled: August 21, 2009Publication date: June 30, 2011Inventors: Nobuo Miyadera, Kenta Mizusawa, Kazunari Shinbo, Yasuo Ohdaira, Akira Baba, Keizo Kato, Futao Kaneko, Takahiro Kawakami
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Patent number: 7843570Abstract: A substance adsorption detection method and a sensor utilizing amounts of change in the optical characteristic of a sensitive thin film with respect to the adsorbed amount of a substance to be detected. A clad 4, a core 5, and a thin film 7 for detecting an adsorbed substance are sequentially stacked on a crystal oscillator 10 to constitute an optical waveguide layer 12 and a gas adsorption member 11. An incoming light prism 8 and an outgoing light prism 9 are provided on the surface of the core 5. Changes in the adsorbed mass of the target substance and in the optical characteristic involved can be detected accurately and simultaneously by utilizing a change in outgoing light originating from a change in propagation loss and a change in the oscillation characteristic of the oscillator 10, both caused by adsorption of the target substance on the core surface.Type: GrantFiled: July 28, 2005Date of Patent: November 30, 2010Assignee: Niigata UniversityInventors: Kazunari Shinbo, Futao Kaneko, Keizo Kato, Yasuo Ohdaira, Takahiro Kawakami
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Publication number: 20100188771Abstract: A magnetoresistive magnetic head according to one embodiment uses a current-perpendicular-to-plane magnetoresistive element having a laminate of a free layer, an intermediate layer, and a pinned layer, the pinned layer being substantially fixed to a magnetic field to be detected, wherein either the pinned layer or the free layer includes a Heusler alloy layer represented by a composition of X-Y-Z, wherein X is between about 45 at. % and about 55 at. % and is Co or Fe, Y accounts for between about 20 at. % and about 30 at. % and is one or more elements selected from V, Cr, Mn, and Fe, and Z is between about 20 at. % and about 35 at.Type: ApplicationFiled: December 11, 2009Publication date: July 29, 2010Inventors: Susumu Okamura, Yo Sato, Katsumi Hoshino, Hiroyuki Hoshiya, Kenichi Meguro, Keizo Kato
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Publication number: 20080060438Abstract: A substance adsorption detection method and a sensor utilizing amounts of change in the optical characteristic of a sensitive thin film with respect to the adsorbed amount of a substance to be detected. A clad 4, a core 5, and a thin film 7 for detecting an adsorbed substance are sequentially stacked on a crystal oscillator 10 to constitute an optical waveguide layer 12 and a gas adsorption member 11. An incoming light prism 8 and an outgoing light prism 9 are provided on the surface of the core 5. Changes in the adsorbed mass of the target substance and in the optical characteristic involved can be detected accurately and simultaneously by utilizing a change in outgoing light originating from a change in propagation loss and a change in the oscillation characteristic of the oscillator 10, both caused by adsorption of the target substance on the core surface.Type: ApplicationFiled: July 28, 2005Publication date: March 13, 2008Applicant: Niigata UniversityInventors: Kazunari Shinbo, Futao Kaneko, Keizo Kato, Yasu Ohdaira, Takahiro Kawakami
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Publication number: 20080022755Abstract: The invention provides a gas detection method and a gas sensor which utilize an amount of change in the electrical characteristic of a gas sensitive thin film with respect to the adsorption amount of a gas to be detected. The gas sensitive thin film (7) having characteristic detection electrodes (5, 6) functioning as a sandwich electrode or a gap electrode is laid out on a crystal resonator (10), and change in the electrical characteristic of the gas sensitive thin film (7) with respect to the adsorption amount of the detection target gas is observed by simultaneously determining change in the oscillatory frequency of the crystal resonator (10) and the electrical characteristic of the gas sensitive thin film (7). Because the sensor is an integral type device, both changes in an adsorption mass and the electrical characteristic can be surely monitored.Type: ApplicationFiled: July 12, 2005Publication date: January 31, 2008Applicants: Weidmann Plastics Technology AG, NIIGATA UNIVERSITYInventors: Kazunari Shinbo, Futao Kaneko, Keizo Kato, Yasuo Ohdaira, Takahiro Kawakami, Masahiro Minagawa
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Patent number: 6924246Abstract: A new lead-free glass flux suitable for the decoration of ceramic materials comprises SiO2, Al2O3, B2O3 and Li2O as essential components. The lead-free glass flux is a glass mixture in which a glass composition having a relatively low coefficient of thermal expansion and a glass composition having a relatively high coefficient of thermal expansion and a relatively high chemical resistance are mixed at an appropriate ratio.Type: GrantFiled: July 31, 2003Date of Patent: August 2, 2005Assignee: Noritake Co., LimitedInventors: Keizo Kato, Takuya Kawamura, Nobuhiro Inoko, Hiroshi Norizuki
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Publication number: 20050003488Abstract: A polypeptide prepared from mouse ES cell strains by the SST method and a homologous polypeptide obtained from mouse kidney, human uterus, mouse fetus, human fetal liver and pancreas libraries; a cDNA encoding the polypeptide; a fragment selectively hybridizing with the sequence of the cDNA; a replication or expression plasmid containing the cDNA integrated thereinto; a host cell transformed with plasmid; an antibody against the polypeptide; and a pharmaceutical composition containing the polypeptide or the antibody.Type: ApplicationFiled: August 2, 2004Publication date: January 6, 2005Inventors: Tasuku Honjo, Keizo Kato, Hideaki Tada
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Publication number: 20040029700Abstract: A new lead-free glass flux suitable for the decoration of ceramic materials comprises SiO2, Al2O3, B2O3 and Li2O as essential components. The lead-free glass flux is a glass mixture in which a glass composition having a relatively low coefficient of thermal expansion and a glass composition having a relatively high coefficient of thermal expansion and a relatively high chemical resistance are mixed at an appropriate ratio.Type: ApplicationFiled: July 31, 2003Publication date: February 12, 2004Applicant: NORITAKE CO., LIMITEDInventors: Keizo Kato, Takuya Kawamura, Nobuhiro Inoko, Hiroshi Norizuki
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Publication number: 20020086364Abstract: A polypeptide prepared from mouse ES cell strains by the SST method and a homologous polypeptide obtained from mouse kidney, human uterus, mouse fetus, human fetal liver and pancreas libraries; a cDNA encoding the polypeptide; a fragment selectively hybridizing with the sequence of the cDNA; a replication or expression plasmid containing the cDNA integrated thereinto; a host cell transformed with plasmid; an antibody against the polypeptide; and a pharmaceutical composition containing the polypeptide or the antibody.Type: ApplicationFiled: December 4, 2001Publication date: July 4, 2002Applicant: ONO PHARMACEUTICAL CO., LTD.Inventors: Tasuku Honjo, Keizo Kato, Hideaki Tada
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Patent number: 5338178Abstract: According to the present invention, etching is used to form a concave and convex pattern corresponding to information on an embossing metal mold comprising a conductive layer and a layer which includes an Ni electric-plating layer, or an Ni electric-plating layer, so that the surface of the embossing metal mold will not be contaminated even if processing conditions are somewhat changed, and that the mold will have less defects. Thus, optical disk substrates of high quality can be produced. Besides, time required for manufacturing a stamper can be shortened.Type: GrantFiled: November 27, 1991Date of Patent: August 16, 1994Assignee: Hitachi, Ltd.Inventors: Keizo Kato, Shinkichi Horigome, Ryo Suzuki, Masaru Ito
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Patent number: 5330880Abstract: In a process for producing optical disks comprising the steps of subjecting the photoresist layer on a substrate formed of silicon, quartz, glass or a metal to light exposure, developing and etching treatments to obtain a stamper and then duplicating an information pattern for an optical disk from the stamper obtained above to a transparent substrate by using a UV curable resin to prepare a replicated substrate of an optical disk, a large number of stampers can be prepared in a short time by conducting the light exposure either by contacting the mask side surface of a substrate provided with a photomask having an information pattern for an optical disk to the photoresist side surface of said substrate having the photoresist layer or by noncontact projection, and a rapid replication of large quantities of replicated substrates becomes possible by using a large number of stampers thus prepared.Type: GrantFiled: August 28, 1992Date of Patent: July 19, 1994Assignee: Hitachi, Ltd.Inventors: Shinkichi Horigome, Yoshinori Miyamura, Yumiko Anzai, Keizo Kato, Hiroshi Shiraishi
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Patent number: 5296995Abstract: The present invention uses a magnetic recording medium equipped with those magnetically readable recording servo pits which are preformed on a magnetic recording medium and have different magnetic characteristics from those of a recording magnetic film, detects magnetically a tracking signal or preformat signals such as sync signals, address signals, and the like, from the magnetic flux distribution (leakage magnetic field) occurring at edges of each of the servo pits using a magnetic head, makes servo control of the position of the magnetic head by the detected tracking signal and records or reads magnetically the data along the center of a track.Type: GrantFiled: January 4, 1993Date of Patent: March 22, 1994Assignee: Hitachi, Ltd.Inventors: Seiji Yonezawa, Keiji Kataoka, Hajime Fukke, Tsuneo Terasawa, Keizo Kato, Harukazu Miyamoto, Klaus Kinstatter, Masaru Ito, Norio Ohta
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Patent number: 5295121Abstract: A magneto-optic recording medium in which a vertically magnetized film on which magnetized domains are recorded by applying a light beam and an outer magnetic field is provided along a recording track and structure bands which do not contribute to read out of the magnetized domains are provided on both sides of the recording track so that the magnetization state of the magnetized domains recorded on the vertically magnetized film is read from an area limited by the width of the recording track.Type: GrantFiled: January 31, 1989Date of Patent: March 15, 1994Assignee: Hitachi, Ltd.Inventors: Hirofumi Sukeda, Keizo Kato
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Patent number: 4484488Abstract: A forward-reverse changeover apparatus for working vehicles which comprises frist and second multiplate clutches, and an input shaft and an output shaft arranged concentrically with and separated from each other. Output gears extending from the first and second clutches respectively have the same number of teeth, and the output gear from the second clutch is positioned closer to the input shaft than an input gear on the output shaft.Type: GrantFiled: April 21, 1982Date of Patent: November 27, 1984Assignee: Kubota, Ltd.Inventors: Keizo Kato, Yasunobu Yamaue