Patents by Inventor Akira Kojima
Akira Kojima 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: 20130029222Abstract: To provide a sulfur-system positive electrode for lithium-ion battery, sulfur-system positive electrode which is good in the cyclability and the other characteristics, and a lithium-ion secondary battery including that positive electrode. In a positive electrode for lithium-ion secondary battery, the positive electrode having: a current collector; and an electrode layer that is formed on a surface of the current collector, and which includes a binder resin, an active material and a conductive additive, the positive electrode is characterized in that: the active material includes a sulfur-modified polyacrylonitrile that is produced by heating a raw-material powder including a sulfur powder and a polyacrylonitrile powder in an enclosed nonoxidizing atmosphere; and the binder resin includes a polyimide resin and/or a polyamide-imide resin.Type: ApplicationFiled: April 12, 2011Publication date: January 31, 2013Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Junichi Niwa, Kazuaki Hokano, Masataka Nakanishi, Akira Kojima, Kazuhito Kawasumi, Takuhiro Miyuki, Tetsuo Sakai
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Patent number: 8232711Abstract: A surface emission type electron source including a first electrode having a planar form, a second electrode having a planar form facing the first electrode, an electron passage layer disposed between the first electrode and the second electrode, an insulator or semiconductor layer between the second electrode and the electron passage layer, and a power source part configured to apply a voltage to the second electrode and the first electrode. The electron passage layer includes plural quantum wires extending in a first direction from the first electrode to the second electrode. The quantum wires are made of silicon and spaced apart from each other at predetermined intervals, and electrons are emitted from a front surface of the second electrode. Protrusions protruding toward leading ends of the quantum wires are formed on a back surface of the second electrode at positions corresponding to the quantum wires.Type: GrantFiled: April 23, 2008Date of Patent: July 31, 2012Assignee: Crestec CorporationInventors: Akira Kojima, Hideyuki Ohyi
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Publication number: 20110315919Abstract: A process is provided, process which makes it possible to produce lithium-borate-system materials by means of relatively simple means, lithium-borate-system materials which are useful as positive-electrode active materials for lithium-ion secondary battery, and the like, whose cyclic characteristics, capacities, and so forth, are improved, and which have better performance. The present production is characterized in that a divalent metallic compound including at least one member of compounds that is selected from the group consisting of divalent-iron compounds and divalent-manganese compounds, and boric acid as well as lithium hydroxide are reacted at 400-650° C. in a molten salt of a carbonate mixture comprising lithium carbonate and at least one member of alkali-metal carbonates that is selected from the group consisting of potassium carbonate, sodium carbonate, rubidium carbonate and cesium carbonate in a reducing atmosphere.Type: ApplicationFiled: March 4, 2010Publication date: December 29, 2011Applicants: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Toshikatsu Kojima, Tetsuo Sakai, Takuhiro Miyuki, Akira Kojima, Junichi Niwa, Hitotoshi Murase
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Patent number: 8078921Abstract: Embodiments of the present invention help improve the process for updating parities accompanied by the writing process. According to one embodiment, a host controller transmits a write command and new data to a hard disk drive (HDD). The HDD reads old data at a region where the new data are to be written. The HDD then XORs the new data and the old data to generate a pseudo-parity. The HDD sets the pseudo-parity in a data frame addressed to both of a horizontal parity disk drive HDD and a diagonal parity disk drive HDD and transmits it. The horizontal parity disk drive HDD and the diagonal parity disk drive HDD update the parities using the pseudo-parity.Type: GrantFiled: October 2, 2007Date of Patent: December 13, 2011Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Akira Kojima, Hiromoto Takeda, Hiroyuki Takada
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Publication number: 20110291055Abstract: The present invention is one which provides a production process for lithium-silicate-system compound, the production process being characterized in that: a lithium-silicate compound being expressed by Li2SiO3 is reacted with a substance including at least one member of transition-metal elements that is selected from the group consisting of iron and manganese at 400-650° C. in a molten salt of a carbonate mixture comprising lithium carbonate and at least one member of alkali-metal carbonates that is selected from the group consisting of potassium carbonate, sodium carbonate, rubidium carbonate and cesium carbonate in a mixed-gas atmosphere including carbon dioxide and a reducing gas; and a positive-electrode active material for lithium-ion secondary battery that comprises a lithium-silicate-system compound being obtained by the aforesaid process.Type: ApplicationFiled: November 20, 2009Publication date: December 1, 2011Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Toshikatsu Kojima, Tetsuo Sakai, Takuhiro Miyuki, Yasue Okumura, Akira Kojima, Junichi Niwa, Hitotoshi Murase
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Publication number: 20110058230Abstract: An oscillating mirror module as a deflecting unit is disposed so that a movable mirror faces a plane where image carriers are arranged. A plurality of light source units are disposed within a plane parallel to the plane where the image carriers are arranged so that main light fluxes of light beams emitted from the light sources form predetermined angles with each other. The oscillating mirror module includes an incidence mirror that bends a plurality of light beams emitted from the light source units to direct the light beams to the movable mirror, and a separation mirror that separates the light beams scanned by the movable mirror into two opposite directions with respect to a cross-section including a surface normal of the movable mirror and perpendicular to the rotation axis of the movable mirror. A light collecting unit collects light beams so that output optical axes of the light beams corresponding to the light source units intersect on a surface of the movable mirror of the deflecting unit.Type: ApplicationFiled: August 30, 2010Publication date: March 10, 2011Applicant: RICOH COMPANY, LTD.Inventors: Masahiro SOEDA, Tadashi Nakamura, Akira Kojima, Tomohiro Nakajima
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Publication number: 20110031935Abstract: The present invention is characterized in that, in a negative electrode for lithium-ion secondary battery, the negative electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of collector, the binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I); and the active material includes a lithium-inactive metal that does not form any intermetallic compounds with lithium, or a silicide of the lithium-inactive metal, and an elemental substance of Si. It is possible to upgrade cyclic characteristics by means of using the negative electrode for lithium-ion secondary battery according to the present invention. wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.Type: ApplicationFiled: March 17, 2009Publication date: February 10, 2011Applicant: kabushiki kaisha toyota jidoshokkiInventors: Manabu Miyoshi, Hitotoshi Murase, Akira Kojima, Junichi Niwa, Takayuki Hirose, Kazuhiro Izumoto, Hideki Goda
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Patent number: 7874428Abstract: An air-packing device has an improved shock absorbing capability to protect a product in a container box. The air-packing device is comprised of first and second thermoplastic films where predetermined portions are bonded thereby creating a plurality of air containers, a plurality of heat-seal lands each sealing the first and second thermoplastic films in a small area of the air container thereby creating a plurality of series connected air cells for each air container, a plurality of check valves for corresponding air containers for allowing the compressed air to flow in a forward direction. The plurality of heat-seal lands at predetermined sides of the air-packing device create triangled areas of the air cells, and the air-packing device is folded at the heat-seal lands, thereby creating an inner space for packing a product therein.Type: GrantFiled: October 30, 2008Date of Patent: January 25, 2011Assignee: Air-Paq, Inc.Inventors: Akira Kojima, Wei-Wen Peng
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Patent number: 7754514Abstract: A method of making a light emitting element, the light emitting element with a semiconductor layer represented by: AlXInYGa1?X?YN (0?X?1, 0?Y?1, 0?X+Y?1), has the step of wet-etching a surface of the semiconductor layer by using an etching solution to have a roughened surface on the semiconductor layer. The wet-etching is conducted without irradiating the surface of the semiconductor layer with a light with a wavelength region corresponding to energy higher than bandgap energy of the semiconductor layer.Type: GrantFiled: August 21, 2007Date of Patent: July 13, 2010Assignee: Toyoda Gosei Co., Ltd.Inventors: Takayoshi Yajima, Masanobu Ando, Toshiya Uemura, Akira Kojima, Koji Kaga
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Publication number: 20100149684Abstract: A data-storage device with a security function for user data stored in a data-storage medium. The data-storage device includes: the data-storage medium for storing data; an authentication processing section for performing an authentication process with a key obtained from a host; an error correction circuit for performing error correction in reading data at an address designated by a read command from a host which has been recognized as an authorized user for analysis access by the authentication processing section; and an analysis processing section for generating data indicating the positions of the error correction and transferring the data to the host.Type: ApplicationFiled: December 16, 2009Publication date: June 17, 2010Inventors: Akira KOJIMA, Yoshiju Watanabe, Takeshi Shikama, Masatoshi Nishina
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Publication number: 20100072875Abstract: A surface emission type electron source according to the present invention includes a first electrode having a planar form; a second electrode having a planar form facing the first electrode; an electron passage layer disposed between the first electrode and the second electrode; and a power source part configured to apply a voltage to the second electrode and the first electrode. The electron passage layer includes plural quantum wires extending in a first direction from the first electrode to the second electrode. The quantum wires are spaced apart from each other at predetermined intervals, and electrons are emitted from a front surface of the second electrode. The quantum wires are made of silicon, and each of the quantum wires has plural thin parts having small thicknesses formed at predetermined intervals along the first direction.Type: ApplicationFiled: April 23, 2008Publication date: March 25, 2010Inventors: Akira Kojima, Hideyuki Ohyi
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Patent number: 7657794Abstract: Embodiments of the invention provide an error recovery scheme that allows a data read/write error in a data storage device to be processed within a short time, and a data storage device that attempts error recovery using the error recovery scheme. In one embodiment, a data storage device conducts an error recovery process for a data access error in accordance with an error recovery procedure having multiple error recovery steps; the data storage device including a head that accesses a data region of a user data storage medium, and a controller that controls the error recovery process by using not only address information of the sector where the access error to the data region has occurred, but also an error recovery log which has address information of the data region and past error recovery information associated with the latter address information.Type: GrantFiled: May 31, 2006Date of Patent: February 2, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Masatoshi Ichikawa, Akira Kojima, Yoshinori Makita, Kazunari Kose
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Patent number: 7569635Abstract: A polyphenylene sulfide resin composition which comprises 100 parts by weight of a polyphenylene sulfide resin (A) and, compounded therewith, 1 to 100 parts by weight of glass fibers (B) having a single-fiber diameter of 12 ?m or lager and has a crystallization temperature during cooling of 205° C. or lower. Also provided is a polyphenylene sulfide resin composition which comprises 100 parts by weight of a polyphenylene sulfide resin (A) and, compounded therewith, 1 to 100 parts by weight of glass fibers (B) having a single-fiber diameter of 10 to 12 ?m, excluding 12 ?m, has a crystallization temperature during cooling of 205° C. or lower and a chloroform-extractable content of 0.5 wt. % or lower, and gives a 2 mm-thick molded product which has a transmittance of 15% or higher for laser beam having a wavelength of 940 nm and a heat distortion temperature of 230° C. or higher under a load of 1.82 MPa.Type: GrantFiled: May 25, 2004Date of Patent: August 4, 2009Assignee: Toray Industries, Inc.Inventors: Akira Kojima, Takeshi Nishi, Hisaya Iwamura
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Patent number: 7532227Abstract: An optical scanner is capable of effectively correcting a difference with respect to the sub-scanning direction between the positions of optical spots for scanning photoconductor drums of a tandem type color image forming apparatus. The optical scanner includes an optical axis adjusting part. The optical axis adjusting part uses a deflecting mirror or a wedge-shaped prism to deflect the optical axis of an optical beam with respect to the sub-scanning direction. As a result, it is possible to accurately correct a resist difference among individual image forming stations and form a high-quality color image without any color displacement.Type: GrantFiled: July 1, 2003Date of Patent: May 12, 2009Assignee: Ricoh Company, Ltd.Inventors: Tomohiro Nakajima, Akira Kojima, Ikuko Yamashiro, Seizo Suzuki, Taku Amada, Yoshinori Hayashi, Kazuyuki Shimada
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Patent number: 7525561Abstract: An optical scanner is capable of effectively correcting a difference with respect to the sub-scanning direction between the positions of optical spots for scanning photoconductor drums of a tandem type color image forming apparatus. The optical scanner includes an optical axis adjusting part. The optical axis adjusting part uses a deflecting mirror or a wedge-shaped prism to deflect the optical axis of an optical beam with respect to the sub-scanning direction. As a result, it is possible to accurately correct a resist difference among individual image forming stations and form a high-quality color image without any color displacement.Type: GrantFiled: June 13, 2006Date of Patent: April 28, 2009Assignee: Ricoh Company, Ltd.Inventors: Tomohiro Nakajima, Akira Kojima, Ikuko Yamashiro, Seizo Suzuki, Taku Amada, Yoshinori Hayashi, Kazuyuki Shimada
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Publication number: 20090091122Abstract: The present invention provides a personal information protecting sheet in which personal information can be easily made illegible. The personal information protecting sheet includes a base material, a release layer formed on at least a part of the surface of the base material, and an image-receiving layer formed on the release layer. When a force having a directional component that is larger than a predetermined value and parallel to the surface of the base material is applied to the surface, a portion of the image-receiving layer to which the force is applied is peeled from the release layer.Type: ApplicationFiled: March 9, 2006Publication date: April 9, 2009Inventors: Toru Ogawa, Masayoshi Kajiyama, Toyonari Watanabe, Takuji Oikawa, Sakae Shirasawa, Ryuichi Iwaoka, Hiroyuki Yamaguchi, Sunao Tada, Yosuke Hirooka, Kakuei Hoshino, Akira Kayukawa, Masami Matsumoto, Satoru Terada, Hiroshige Mochida, Masamichi Onda, Atsushi Rakuyama, Kenji Sugaya, Kiyotaka Shingu, Koichi Kashiwabara, Ryuichi Oshio, Akira Kojima, Makoto Hoken, Yoshiyuki Kamata, Yukihiro Matoi, Masashi Miyabe
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Publication number: 20090078928Abstract: A light-emitting device has a structure in which a semiconductor or a conductive substrate having a bottom electrode, a layer for generating hot electrons, quasi-ballistic electrons or ballistic electrons, a luminous layer, and a semitransparent surface electrode are deposited, or a structure in which a holes supply layer is provided between the luminous layer and the semitransparent surface electrode having the same structure. The light-emitting device realizes highly efficient light emission in a range from infrared rays to ultraviolet ray with smaller driving current than that of conventional injection-type or intrinsic EL devices.Type: ApplicationFiled: July 27, 2004Publication date: March 26, 2009Inventors: Nobuyoshi Koshida, Akira Kojima
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Publication number: 20090050510Abstract: An air-packing device has an improved shock absorbing capability to protect a product in a container box. The air-packing device is comprised of first and second thermoplastic films where predetermined portions are bonded thereby creating a plurality of air containers, a plurality of heat-seal lands each sealing the first and second thermoplastic films in a small area of the air container thereby creating a plurality of series connected air cells for each air container, a plurality of check valves for corresponding air containers for allowing the compressed air to flow in a forward direction. The plurality of heat-seal lands at predetermined sides of the air-packing device create triangled areas of the air cells, and the air-packing device is folded at the heat-seal lands, thereby creating an inner space for packing a product therein.Type: ApplicationFiled: October 30, 2008Publication date: February 26, 2009Inventors: Akira Kojima, Wei-Wen Peng
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Patent number: 7486458Abstract: Embodiments of the invention relate to diagnosing error-correcting retries of an upper system by using a disk drive under control of the upper system. In one embodiment, a microprocessor can operate in any of at least two operation modes. One is normal operation mode while the other is pseudo failure operation mode. Mode switching is made by a switch. Strictly, the pseudo failure operation mode includes three different operation modes: 1) pseudo logical error report mode in which a pseudo logical error is reported to the upper system without performing disk control; 2) pseudo component circuit failure mode in which a control circuit is forced to cause a failure by setting invalid control values to the control circuits; and 3) pseudo interface failure mode in which a pseudo interface failure in the system comprising multiple disk drives is reported by setting an invalid control value to the interface control circuit.Type: GrantFiled: January 27, 2005Date of Patent: February 3, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Sumie Takeda, Akira Kojima, Mitsuharu Horiuchi, Shinichi Kobayashi
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Patent number: 7457069Abstract: Embodiments of the invention prevent a magnetic head from coming into contact with a protrusion on a magnetic disk. In one embodiment, a head gimbal assembly includes a piezoelectric actuator for changing the flying height of a head/slider assembly. The address of a protrusion on a magnetic disk is preregistered in a nonvolatile memory. When a seek operation or following operation is to be performed, the head/slider assembly flies at a reference flying height. Before the protrusion passes below the head/slider assembly, an operating voltage is applied to the piezoelectric actuator to increase the flying height. After the protrusion passes below the head/slider assembly, the head/slider assembly flies at the reference flying height with operating voltage application stopped.Type: GrantFiled: March 8, 2006Date of Patent: November 25, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Masaki Yoshioka, Akira Kojima, Toshiyuki Konishi