Patents by Inventor Koichi Yamaguchi

Koichi Yamaguchi 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).

  • Publication number: 20150200055
    Abstract: The present invention is aimed to improve the poor insulation of the laminate-type ceramic electronic component having dielectric ceramic layers of 0.5 ?m or less. A laminate-type ceramic electronic component which is a laminated body having a laminated structure formed by laminating the first ceramic parts and the internal electrode layers alternately. The first ceramic parts have a main ingredient of ABO3 representing a perovskite-type crystal in which site A contains at least Ba and site B contains at least Ti. The laminate-type ceramic electronic component has external electrodes which are connected with the internal electrodes. The end edge parts of the internal electrodes other than the end connected with the external electrodes are connected with the second ceramic parts. The second ceramic parts contain aluminum oxide as a main ingredient.
    Type: Application
    Filed: January 8, 2015
    Publication date: July 16, 2015
    Inventors: Keisuke ISHIDA, Koichi YAMAGUCHI, Makoto ENDO, Shimpei TANABE
  • Publication number: 20150156040
    Abstract: A communication device includes a transmission equalizer that equalizes a transmission signal transmitted in a signal transmission performed via a non-contact coupling, the transmission equalizer creates a plurality of equivalent transmission signals by branching the transmission signal. The transmission equalizer includes a plurality of signal paths that respectively provide time delays different from each other to the equivalent transmission signals, and an output path that provides a filter output based on the total sum of outputs of the signal paths to the non-contact coupling, and at least one of the plurality of signal paths includes a variable delay circuit that can change a time delay to be given to the corresponding transmission signal.
    Type: Application
    Filed: December 22, 2014
    Publication date: June 4, 2015
    Applicant: Renesas Electronics Corporation
    Inventors: Masaharu Matsudaira, Koichi Yamaguchi, Kenichiro Hijioka
  • Patent number: 8982001
    Abstract: Provided is an information processing apparatus including a keyboard portion, a first antenna module, and a connection portion. The keyboard portion includes a base plate to support a plurality of key portions, and a reinforcing member having an electric conductivity to be stacked on and reinforce the base plate. The first antenna module includes an antenna electrode to generate an induced electric field, and a ground portion to electrically connect to the antenna electrode. The connection portion is electrically connected to the ground portion and the reinforcing member.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: March 17, 2015
    Assignee: Sony Corporation
    Inventors: Kazuki Taniguchi, Koichi Yamaguchi, Nobuhiro Kumae
  • Publication number: 20150055273
    Abstract: A laminate-type ceramic electric component such as laminated ceramic capacitor which has excellent mechanical strength and also has thermal shock resistance at the same time is provided. A laminate-type ceramic electronic component comprises an inner layer part, in which dielectric layers comprising ABO3 (which represents a perovskite crystal in which A contains at least Ba and B contains at least Ti) as a main component and internal electrode layers are alternately laminated; and a pair of outer layer parts which sandwich the inner layer part, wherein the outer layer parts comprise a continuous film containing a Ba—Si—Ti—O based crystal phase.
    Type: Application
    Filed: August 18, 2014
    Publication date: February 26, 2015
    Inventors: Makoto ENDO, Koichi YAMAGUCHI, Keisuke ISHIDA
  • Patent number: 8923379
    Abstract: A transmission apparatus includes a transmission equalizer that equalizes a transmission signal transmitted in a signal transmission performed via a non-contact coupling including a magnetic coupling of a pair of coupling elements. The transmission equalizer creates plural equivalent transmission signals by branching the transmission signal; and includes plural signal paths that respectively give time delays different from each other to the equivalent transmission signals, and respectively multiplies the delayed transmission signals by tap coefficients. In addition, at least one pair of signal paths is set includes a variable delay circuit that can change the corresponding time delay to be given to the corresponding transmission signal.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: December 30, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Masaharu Matsudaira, Koichi Yamaguchi, Kenichiro Hijioka
  • Patent number: 8900711
    Abstract: A fluorooxyalkylene group-containing polymer composition including a liner fluorooxyalkylene group-containing polymer represented by the formula (1) which has a hydrolysable group at a terminal and is hereinafter called “one-terminal modified polymer”, and a liner fluorooxyalkylene group-containing polymer represented by the following formula (2) which has hydrolysable groups at the both terminals and is hereinafter called “both-terminal modified polymer”, wherein an amount of the both-terminal modified polymer is 0.1 mole % or more and less than 10 mole %, relative to a total mole of the one-terminal modified polymer and the both-terminal modified polymer.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: December 2, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yuji Yamane, Yasunori Sakano, Koichi Yamaguchi, Noriyuki Koike, Hirofumi Kishita
  • Patent number: 8897832
    Abstract: Disclosed is a semiconductor device including a semiconductor chip and a semiconductor package. The semiconductor package includes an antenna formed of a lead frame, a first wire that connects the antenna and a first electrode pad of the semiconductor chip, and a second wire that connects the antenna and a second electrode pad of the semiconductor chip. The semiconductor chip is disposed in one of four regions in the semiconductor package sectioned by line segments connecting midpoints of two pairs of opposing sides of the semiconductor package. A centroid of the semiconductor chip is positioned outside a closed curve composed of a straight line segment connecting a first connection point where the antenna and the first wire are connected and a second connection point where the antenna and the second wire are connected, and a line connecting the first and second connection points along the antenna.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: November 25, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Kenichiro Hijioka, Koichi Yamaguchi
  • Patent number: 8860376
    Abstract: A charging control circuit for a secondary battery includes a temperature detection terminal for detecting the temperature of a secondary battery from an input detected voltage; a temperature comparison part having four threshold voltages corresponding to four reference temperatures, the temperature comparison part being configured to compare the four threshold voltages with the detected voltage input to the temperature detection terminal and to output a temperature range signal indicating the temperature range of the detected voltage; and a control part configured to control a charging current and/or a charging voltage based on the temperature range signal output from the temperature comparison part.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: October 14, 2014
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Daisuke Kimura, Koichi Yamaguchi, Iwao Kitamura
  • Patent number: 8765870
    Abstract: A diluent for a fluorine-containing silicone coating agent, said diluent comprising (A) at least one selected from diisopropyl ether and hexane, and (B) a fluorinated solvent having a boiling point, at atmospheric pressure, which is higher than that of the component (A) by at least 30° C. and is 180° C. or lower, with a weight ratio of the component (A) to the component (B) ranging from 95/5 to 50/50.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: July 1, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koichi Yamaguchi, Hirofumi Kishita
  • Patent number: 8743944
    Abstract: A decision feedback equalizer is provided for correcting ISI on a first postcursor without using received decision data of a preceding bit. The decision feedback equalizer includes an amplifying circuit that is to be supplied with received data, a duobinary signal decision device for determining an output signal from the amplifying circuit, the duobinary signal decision device including a flip-flop, a shift register for successively shifting a decision result held by the flip-flop, and a plurality of current control blocks that are to be supplied with respective output signals from the shift register, and feeding back output signals to an output terminal of the amplifier to control the potential thereof.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: June 3, 2014
    Assignee: NEC Corporation
    Inventors: Kazuhisa Sunaga, Koichi Yamaguchi
  • Publication number: 20140073243
    Abstract: A first communication device includes a first coupling element and a second communication device includes a second coupling element. The first and second communication devices are configured to wirelessly transmit, between the first and second communication devices, a differential-mode signal and a common-mode signal simultaneously through non-contact coupling between the first and second coupling elements.
    Type: Application
    Filed: August 15, 2013
    Publication date: March 13, 2014
    Applicant: Renesas Electronics Corporation
    Inventors: Kenichiro HIJIOKA, Koichi Yamaguchi, Masaharu Matsudaira
  • Publication number: 20140072025
    Abstract: A transmission apparatus includes a transmission equalizer that equalizes a transmission signal transmitted in a signal transmission performed via a non-contact coupling including a magnetic coupling of a pair of coupling elements. The transmission equalizer creates plural equivalent transmission signals by branching the transmission signal; and includes plural signal paths that respectively give time delays different from each other to the equivalent transmission signals, and respectively multiplies the delayed transmission signals by tap coefficients. In addition, at least one pair of signal paths is set includes a variable delay circuit that can change the corresponding time delay to be given to the corresponding transmission signal.
    Type: Application
    Filed: August 16, 2013
    Publication date: March 13, 2014
    Applicant: Renesas Electronics Corporation
    Inventors: Masaharu Matsudaira, Koichi Yamaguchi, Kenichiro Hijioka
  • Patent number: 8420763
    Abstract: An object of the present invention is to provide a fluorooxyalkylene group-containing polymer composition, which yields a coating having excellent adhesior to a substrate, good water- and oil-repellency, a low dynamic friction coefficient, good releasing property, good abrasion resistance and good stain resistance, and to provide a surface treatment agent comprising the same. The present inventors have found that a composition comprising a fluorooxyalkylene group-containing polymer having a fluorinated group and a hydrolyzable group at each terminal and a fluorooxyalkylene group-containing polymer having hydrolyzable groups at both terminals can form a coating which has excellent water- and oil-repellency, a low dynamic friction coefficient, good releasing property, good abrasion resistance, and good stain resistance.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: April 16, 2013
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yuji Yamane, Noriyuki Koike, Hirofumi Kishita, Koichi Yamaguchi
  • Patent number: 8392011
    Abstract: A semiconductor wafer processing tape sticking apparatus is provided and is capable of sticking a semiconductor wafer processing tape to a semiconductor wafer under the optimum conditions based on the processing data that has been written to a data carrier member and that has been read from the data carrier member without accessing the host computer unlike a conventional method. The semiconductor wafer processing tape sticking apparatus includes: a feeding apparatus provided with a feeding shaft to which a semiconductor wafer processing tape winding body can be detachably attached; a tape data read/write device for reading and writing the processing data that has been written to a data carrier member of the semiconductor wafer processing tape winding body; and a tape sticking apparatus for sticking a semiconductor wafer processing tape that has been fed out from the feeding apparatus to the semiconductor wafer based on the processing data that has been read by the tape data read/write device.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: March 5, 2013
    Assignee: Lintec Corporation
    Inventors: Takeshi Segawa, Koichi Yamaguchi, Yuichi Iwakata
  • Patent number: 8362186
    Abstract: A coating composition comprising a fluorine-containing silicon compound represented by the following formula (1) wherein Z is a linear or branched divalent polyorganosiloxane residue having 1 to 40 siloxane units, R is an alkyl group having 1 to 4 carbon atoms or a phenyl group, X is a hydrolyzable group, Q is a C2-12 divalent connecting group, a is an integer of 2 or 3, b is an integer of from 1 to 10, y is an integer of 1 to 5, and Rf is a group represented by the following formula (2) -Rf1-(Q-W-Q-Rf1)q-??(2) wherein Rf1 is a perfluoropolyether residue, W is an organopolysiloxane residue having 1 to 40 siloxane units and Q is as defined above and may be the same with or different from each other, and q is an integer of from 0 to 3, and at least one solvent selected from the group consisting of alcohols, esters, ethers, ketones, and perfluoroethers. The coating prepared from the composition is oil-repellent, water-repellent and has water sliding property.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: January 29, 2013
    Assignee: Shin-Etsu Chemical Company Co., Ltd.
    Inventors: Yuji Yamane, Noriyuki Koike, Koichi Yamaguchi, Hirofumi Kishita
  • Publication number: 20120270057
    Abstract: A fluorooxyalkylene group-containing polymer composition comprising a liner fluorooxyalkylene group-containing polymer represented by the formula (1) which has a hydrolysable group at a terminal and is hereinafter called “one-terminal hydrolyzable polymer”, and a liner fluorooxyalkylene group-containing polymer represented by the following formula (2) which has hydrolysable groups at the both terminals and is hereinafter called “both-terminal hydrolyzable polymer”, wherein an amount of the both-terminal hydrolyzable polymer is 0.1 mole % or more and less than 10 mole %, relative to total mole of the one-terminal hydrolyzable polymer and the both-terminal hydrolyzable polymer.
    Type: Application
    Filed: April 16, 2012
    Publication date: October 25, 2012
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yuji YAMANE, Koichi YAMAGUCHI, Noriyuki KOIKE
  • Patent number: 8248176
    Abstract: A disclosed current source circuit includes a current mirror circuit having two enhancement-type MOS transistors, a depletion-type MOS transistor configured to be connected to a drain of one of the two enhancement-type MOS transistors and to function as a constant current source, and a resistor configured to have a negative temperature property and be connected to a source of the one of the two enhancement-type MOS transistors.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: August 21, 2012
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Yoichi Takano, Koichi Yamaguchi, Koichi Kuwahara
  • Publication number: 20120077041
    Abstract: A fluorooxyalkylene group-containing polymer composition including a liner fluorooxyalkylene group-containing polymer represented by the formula (1) which has a hydrolysable group at a terminal and is hereinafter called “one-terminal modified polymer”, and a liner fluorooxyalkylene group-containing polymer represented by the following formula (2) which has hydrolysable groups at the both terminals and is hereinafter called “both-terminal modified polymer”, wherein an amount of the both-terminal modified polymer is 0.1 mole % or more and less than 10 mole %, relative to a total mole of the one-terminal modified polymer and the both-terminal modified polymer.
    Type: Application
    Filed: September 7, 2011
    Publication date: March 29, 2012
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yuji Yamane, Yasunori Sakano, Koichi Yamaguchi, Noriyuki Koike, Hirofumi Kishita
  • Patent number: 8044761
    Abstract: A varistor 1 comprises a varistor element 10, a pair of external electrodes 30a, 30b on one main side of the varistor element 10 and a resistor 60 on the same main side, wherein the resistor 60 is formed so as to connect the pair of external electrodes 30a, 30b. The varistor element 10 contains zinc oxide as the main component and Ca oxides, Si oxides and rare earth metal oxides as accessory components, wherein the proportion X of the calcium oxides in terms of calcium atoms is 2-80 atomic percent with respect to 100 mol of the main component and the proportion Y of the silicon oxides in terms of silicon atoms is 1-40 atomic percent with respect to 100 mol of the main component, X/Y satisfying formula (1) below, and the external electrodes and resistor contain oxides other than bismuth oxide and copper oxide 1?X/Y<3??(1).
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: October 25, 2011
    Assignee: TDK Corporation
    Inventors: Miyuki Yanagida, Koichi Yamaguchi, Katsuhiko Igarashi, Naoki Chida
  • Publication number: 20110251339
    Abstract: A solventless releaser composition is provided comprising (A) an organopolysiloxane containing at least two alkenyl groups and at least one monovalent fluorinated substituent group and having a fluorine content of 30-50 wt % and a viscosity of 100-2,000 mPa-s at 25° C., (B) an organohydrogenpolysiloxane containing at least three SiH groups, (C) a reaction regulator, and (D) a platinum catalyst. The composition is coated and cured to a substrate to form a release liner for use with silicone pressure-sensitive adhesives.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 13, 2011
    Inventors: Koichi YAMAGUCHI, Hirofumi Kishita