Patents by Inventor Takayuki Ishikawa

Takayuki Ishikawa 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: 8595256
    Abstract: To eliminate restrictions on the order of writing in an access control list. A permission rule and a prohibition rule are stored in advance. A rule is read out from an access control list accepted, and a determination is made as to whether the readout rule is contained in the permission and prohibition rules stored in advance. When the readout rule is not contained and when the readout rule is a permission rule, the readout rule is stored in the temporary storage unit. When the readout rule is not contained and when the readout rule is a prohibition rule, a determination is made as to whether the prohibition rule conflicts with the permission rule stored in the temporary storage unit. When the prohibition rule does not conflict, the prohibition rule is stored in the temporary storage unit.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: November 26, 2013
    Assignee: NEC Corporation
    Inventor: Takayuki Ishikawa
  • Publication number: 20130250656
    Abstract: A memory device includes a first electrode, a second electrode, a third electrode, a first variable resistance layer between the first electrode and the third electrode, and a second variable resistance layer between the second electrode and the third electrode. The first, second, and third electrodes, and the first and second variable resistance layers are formed of materials that cause the first variable resistance layer to transition from a high resistance state to a low resistance state when a voltage is applied across the first and second electrodes and maintain the high resistance state when the voltage is cut off, and cause the second variable resistance layer to transition from a high resistance state to a low resistance state when the voltage is applied across the first and second electrodes and transition from the high resistance state to the low resistance state when the voltage is cut off.
    Type: Application
    Filed: September 6, 2012
    Publication date: September 26, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takayuki ISHIKAWA, Yoshifumi Nishi, Daisuke Matsushita, Masato Koyama
  • Publication number: 20130234088
    Abstract: According to an embodiment, a semiconductor device includes first and second memristors. The first memristor includes a first electrode made of a first material, a second electrode made of a second material, and a first resistive switching film arranged between the first and second electrodes. The first resistive switching film is connected to both the first and second electrodes. The second memristor includes a third electrode made of a third material, a fourth electrode made of the second material, and a second resistive switching film arranged between the third and fourth electrodes. The second resistive switching film is connected to both the third and fourth electrodes. The work function of the first material is smaller than that of the second material. The work function of the third material is larger than that of the second material.
    Type: Application
    Filed: December 27, 2012
    Publication date: September 12, 2013
    Inventors: Yoshifumi Nishi, Takao Marukame, Takayuki Ishikawa, Masato Koyama
  • Publication number: 20130228736
    Abstract: According to one embodiment, a memory device includes a first electrode, a second electrode, and a variable resistance film. The variable resistance film is connected between the first electrode and the second electrode. The first electrode includes a metal contained in a matrix made of a conductive material. A cohesive energy of the metal is lower than a cohesive energy of the conductive material. A concentration of the metal at a central portion of the first electrode in a width direction thereof is higher than concentrations of the metal in two end portions of the first electrode in the width direction.
    Type: Application
    Filed: August 30, 2012
    Publication date: September 5, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Daisuke MATSUSHITA, Shosuke Fujii, Yoshifumi Nishi, Akira Takashima, Takayuki Ishikawa, Hidenori Miyagawa, Takashi Haimoto, Yusuke Arayashiki, Hideki Inokuma
  • Publication number: 20130156154
    Abstract: An X-ray diagnosis apparatus includes a radiography image generating unit, a fluoroscopy image generating unit, a display control unit and an irradiation field changing unit. The radiography image generating unit controls an X-ray irradiation device, an X-ray detection device, a retainer, and a bed system, and generates a radiography image by using a radiography irradiation field. The fluoroscopy image generating unit controls the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and generates a fluoroscopy image by using a fluoroscopy irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field. The display control unit generates a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and displays the superimposed image on a display device. The irradiation field changing unit changes the fluoroscopy irradiation field with the superimposed image being displayed.
    Type: Application
    Filed: December 10, 2012
    Publication date: June 20, 2013
    Inventors: Koichiro Watanabe, Hisato Takemoto, Takayuki Ishikawa, Takuya Sakaguchi
  • Publication number: 20130130761
    Abstract: A game machine determines the reference timing included in a predetermined time range and the crossing direction position corresponding to the reference timing based on the sequence data (30). And, the game machine causes an instruction path (R) extending from one end side (UP) in depth direction (TD) toward the other end side (DP) while passing through each crossing direction position corresponding to each reference timing at a position on the time axis corresponding to each reference timing and the reference line (TL), to be displayed on the game screen, and decreases a distance between each position and the reference line (TL) with a decrease in a time difference between the reference timing and the current time.
    Type: Application
    Filed: July 6, 2012
    Publication date: May 23, 2013
    Inventors: Kazuha Hayashi, Yoshitaka Nishimura, Tetsuhiro Honjo, Aoi Tagami, Takayuki Ishikawa, Hidenori Kotera, Yuki Sato, Yuma Miyazaki, Eriko Motohashi
  • Publication number: 20130130795
    Abstract: A game machine includes: a monitor (2) that displays and outputs a game screen (40R); a control panel (3) that includes volume controllers (9) operated so as to change a position of an outer circumferential portion (SP) of a knob portion (9T); a external storage device (20) that stores sequence data (30) in which a reference timing at which the volume controllers (9) are operated during a game is associated with a reference position at which the outer circumferential portion (SP) is to be positioned at the reference timing. And, the game machine teaches information of the reference timing and the reference position to a player, based on the sequence data (30).
    Type: Application
    Filed: July 6, 2012
    Publication date: May 23, 2013
    Inventors: Kazuha Hayashi, Yoshitaka Nishimura, Tetsuhiro Honjo, Aoi Tagami, Takayuki Ishikawa, Hidenori Kotera, Yuki Sato, Yuma Miyazaki, Eriko Motohashi
  • Publication number: 20130056074
    Abstract: Disclosed is a dye-sensitized solar cell having at least a substrate, a first electrode, a photoelectric conversion layer containing a semiconductor and a sensitizing dye, a positive hole transporting layer containing a solid positive hole transporting material, and a second electrode, in which the positive hole transporting material contains a polythiophene-based polymer which is a conductive polymer formed via copolymerization of at least 2 compounds having a structure represented by Formula (1), (2), or (3) described in the specification.
    Type: Application
    Filed: August 28, 2012
    Publication date: March 7, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kazuya ISOBE, Kenichi ONAKA, Takayuki ISHIKAWA
  • Publication number: 20130012314
    Abstract: Provided is a game system which causes a player to be aware of an operation position during operation. An operation performed by the player is evaluated according to a degree of concordance between timings and a degree of concordance between positions, and a result of evaluation thus made is reflected in proceedings of the game. Accordingly, the player is aware of not only matching timings of operating operation portions with operation timings but also matching positions for operating the operation portions with operation positions constituted from a plurality of regions. The difficulty level of the game is therefore increased. Consequently, interest of the player in the game may be prevented from being lost.
    Type: Application
    Filed: March 15, 2011
    Publication date: January 10, 2013
    Applicant: KONAMI DIGITAL ENTERTAINMENT CO., LTD.
    Inventor: Takayuki Ishikawa
  • Publication number: 20120273747
    Abstract: According to one embodiment, a semiconductor device includes a fin type stacked layer structure which has first to third semiconductor layers, and first to third layer select transistors to select one of the first to third semiconductor layers. The second layer select transistor is normally on in the second semiconductor layer, and is controlled to be on or off in the first and third semiconductor layers. A channel region of the second semiconductor layer which is covered with a gate electrode of the second layer select transistor has a metal silicide.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 1, 2012
    Inventors: Masumi SAITOH, Toshinori NUMATA, Kiwamu SAKUMA, Haruka KUSAI, Takayuki ISHIKAWA
  • Publication number: 20120152356
    Abstract: A photoelectric conversion element comprising: a substrate; a first electrode; a photoelectric conversion layer comprising a semiconductor layer containing a dye and a semiconductor and a charge transport layer; and a second electrode, in this order, wherein the photoelectric conversion layer comprises a compound represented by Formula (1), wherein R1 and R2 each represent a hydrogen atom or an alkyl group which may have a substituent, X, Y and Z each represent a hydrogen atom or a substituent, wherein at least one of X, Y and Z is an electron withdrawing group.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 21, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Takayuki ISHIKAWA, Kazuya ISOBE, Hidekazu KAWASAKI
  • Patent number: 8164982
    Abstract: An ultrasonic sensor includes a transmitting device, receiving devices arranged in an array, and a circuit device. One receiving device is configured as a reference receiving device. The circuit device includes a reference signal generator and first and second synchronous detectors. The reference signal generator generates a reference signal by using a received signal of the reference receiving device. The first synchronous detector performs synchronous detection of a received signal of one of the receiving devices based on the reference signal to detect a distance to an object. The second synchronous detector performs synchronous detection of received signals of the receiving devices except the reference receiving device based on the reference signal to detect a direction of the object.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: April 24, 2012
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Yasuyuki Okuda, Takaaki Kawai, Makiko Sugiura, Takayuki Ishikawa
  • Publication number: 20120072492
    Abstract: When a client transmits an HTML request to a server (step S5), the server generates HTML texts (step S7), and transmits the generated texts to the client (step S8). A control unit obtains information displayed by a browser (step S11), and determines whether or not confidential information like personal information is displayed by the browser and it is necessary to create a log, and creates the log if necessary (step S12). When creating the log, the control unit transmits the created log to the WWW server (step S13).
    Type: Application
    Filed: May 27, 2010
    Publication date: March 22, 2012
    Applicant: NEC CORPORATION
    Inventors: Satoshi Aoki, Takayuki Ishikawa, Masaru Kawakita, Shuntaro Nagai, Shigeyoshi Shima
  • Publication number: 20120030243
    Abstract: To eliminate restrictions on the order of writing in an access control list. A permission rule and a prohibition rule are stored in advance. A rule is read out from an access control list accepted, and a determination is made as to whether the readout rule is contained in the permission and prohibition rules stored in advance. When the readout rule is not contained and when the readout rule is a permission rule, the readout rule is stored in the temporary storage unit. When the readout rule is not contained and when the readout rule is a prohibition rule, a determination is made as to whether the prohibition rule conflicts with the permission rule stored in the temporary storage unit. When the prohibition rule does not conflict, the prohibition rule is stored in the temporary storage unit.
    Type: Application
    Filed: March 17, 2010
    Publication date: February 2, 2012
    Inventor: Takayuki Ishikawa
  • Patent number: 8091873
    Abstract: A coned disc spring is arranged between a second component and a third component provided inside a tubular first component and movable in an axial direction. The coned disc spring comprises a body having a circular dish shape, teeth closely fitting into spline grooves formed on an inner peripheral surface of the first component and projecting to a radial outer side on an outer periphery of the body, and a stress relaxation portion formed by notching a base of the tooth in an approximately circular arc shape in a direction at least one of a circumferential direction and a radial direction of the body.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: January 10, 2012
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd., NHK Spring Co., Ltd.
    Inventors: Yukitoshi Ogawa, Takayuki Ishikawa, Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki, Hironobu Imaizumi
  • Publication number: 20110321123
    Abstract: An access control list conversion system includes: a first rule judgment unit 12 that judges whether an access control rule is a permission rule or a prohibition rule; a temporary storage unit 15 that stores the access control rule which is judged to be the permission rule; a second rule judgment unit 13 that judges whether the actor user of the prohibition rule is the same as the actor user of the permission rule and whether the access target resource of the prohibition rule includes the access target resource of the permission rule; a resource DB that stores resource information in which all of the latest information of the access target resource is systematically recorded; and a resource expansion unit that removes the access target resource of the permission rule from the access target resource of the access control rule which is judged to have the actor user as that of the permission rule and to include the access target resource of the access control rule, with reference to the resource information.
    Type: Application
    Filed: March 17, 2010
    Publication date: December 29, 2011
    Inventor: Takayuki Ishikawa
  • Publication number: 20110299746
    Abstract: An image processing apparatus and a medical image diagnosis apparatus comprise a creation unit, a designation unit, a measurement unit, and a display control unit. The creation unit is configured to create a virtual endoscopic image observed using a preset viewpoint position and a preset line-of-sight direction based on 3-dimensional image data. The designation unit is configured to analyze the 3-dimensional image data to designate a plaque portion and/or a calcification portion. The measurement unit is configured to measure information on spatial distribution of the plaque portion and/or the calcification portion designated by the designation unit. The display control unit is configured to perform control to display the virtual endoscopic image created by the creation unit and the information on spatial distribution measured by the measurement unit.
    Type: Application
    Filed: June 6, 2011
    Publication date: December 8, 2011
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Tadaharu KOBAYASHI, Takayuki ISHIKAWA, Shingo ABE
  • Publication number: 20110261651
    Abstract: An ultrasonic sensor includes a transmitting device, receiving devices arranged in an array, and a circuit device. One receiving device is configured as a reference receiving device. The circuit device includes a reference signal generator and first and second synchronous detectors. The reference signal generator generates a reference signal by using a received signal of the reference receiving device. The first synchronous detector performs synchronous detection of a received signal of one of the receiving devices based on the reference signal to detect a distance to an object. The second synchronous detector performs synchronous detection of received signals of the receiving devices except the reference receiving device based on the reference signal to detect a direction of the object.
    Type: Application
    Filed: June 10, 2011
    Publication date: October 27, 2011
    Applicants: NIPPON SOKEN, INC., DENSO CORPORATION
    Inventors: Yasuyuki Okuda, Takaaki Kawai, Makiko Sugiura, Takayuki Ishikawa
  • Patent number: 7892312
    Abstract: A nitrification inhibitor and a soil improver and a fertilizer containing the same are offered which can be utilized in a wide area from a tropical to a temperate zone, and can be easily obtained from natural origin materials. It is a nitrification inhibitor to inhibit soil nitrification, containing as a main component either one of linoleic acid, ?-linolenic acid, ?-linolenic acid, and methyl linoleate, or their mixture of two or more. By incorporating this nitrification inhibitor into a soil improver or a fertilizer, nitrification of soil can be effectively inhibited.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: February 22, 2011
    Assignee: Japan International Research Center for Agricultural Sciences
    Inventors: Guntur V. Subbarao, Kazuhiko Nakahara, Takayuki Ishikawa, Osamu Ito, Hiroshi Ono, Mayumi Kameyama, Mitsuru Yoshida, Marco Rondon, Idupulapati Madhusudana Rao, Carlos Lascano, Manabu Ishitani
  • Publication number: 20100232573
    Abstract: A cardiovascular x-ray diagnostic system capable of taking radiographs at different positions by moving at least one of a tabletop on which a subject is placed and a radiographic system equipped with an x-ray tube and an x-ray detector includes: an acquisition unit configured to acquire a radiography position from a position of the tabletop and a position of the radiographic system; a reference position identification unit configured to identify a reference radiography position; and a radiographic unit configured to take radiographs by changing a radiographic parameter based on a current radiography position acquired by the acquisition unit and the reference radiography position.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 16, 2010
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Masahiro OZAWA, Takayuki Ishikawa, Yuichiro Watanabe