Patents by Inventor Hiroyuki Kawai

Hiroyuki Kawai 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).

  • Separator for non-aqueous batteries, non-aqueous battery using same, and production method for separator for non-aqueous batteries
    Patent number: 8802271
    Abstract: Provided is a separator for non-aqueous batteries not only having shutdown property but also achieving both higher output and short-circuit resistance. The separator comprising a laminate comprising: a low melting-point polymer fiber layer (A) having a melting point of 100 to 200° C., the low melting-point polymer fiber layer (A) comprising nanofibers having a fiber diameter of 1000 nm or smaller and formed from the low melting-point polymer; and a heat-resistant polymer fiber layer (B) positioned on the low melting-point polymer fiber layer (A) and comprising a high melting-point polymer having a melting point over 200° C. or a heat infusible polymer, the heat-resistant polymer fiber layer (B) comprising a mixture of nanofibers having a fiber diameter of 1000 nm or smaller and non-nanofibers having a fiber diameter over 1000 nm and both formed from heat-resistant polymer.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: August 12, 2014
    Assignee: Kuraray Co., Ltd.
    Inventors: Tomohiro Hayakawa, Hideo Hayashi, Hideki Kamada, Takayoshi Hosoya, Hiroyuki Kawai
  • Carbon nanotube production process and carbon nanotube production apparatus
    Patent number: 8784562
    Abstract: A substrate 10 that selectively allows hydrogen to permeate therethrough is formed with a catalyst thin layer 20 on a first side 11 thereof and is heated in a furnace tube 110, which functions as a reactor, of a heating furnace 100 while a raw material gas to the catalyst thin layer 20 is fed. Hydrogen produced on the first side 11 of the substrate 10 as a result of the formation of carbon nanotubes 5 is separated from the raw material gas and is allowed to permeate to a second side 12 thereof.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: July 22, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masahiro Imanishi, Naoki Ito, Shigeaki Murata, Keisuke Nagasaka, Hiroyuki Kawai, Satoshi Nakazawa
  • Base station apparatus, user equipment and precoding method
    Patent number: 8725186
    Abstract: The present invention provides a base station apparatus capable of preventing degrading of throughput performance even when feedback information amount on precoding in uplink MIMO transmission is reduced. This base station (200) has a scheduler (231) for determining resource blocks used in wireless communications with each mobile station (100) adaptively, a precoding weight selecting section (232) for selecting a precoding weight for controlling phase and/or amplitude of a transmission signal for each antenna in the mobile station (100) based on reception quality on uplink at the resource blocks determined to the mobile station (100); and transmission/reception sections (206a and 206b) for transmitting the determined precoding weight to the mobile station (100).
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: May 13, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hidekazu Taoka, Yuichi Kakishima, Hiroyuki Kawai, Kenichi Higuchi, Mamoru Sawahashi
  • Vehicle airbag system
    Patent number: 8690184
    Abstract: A back plate 7 is provided to a backside of a case 8 which accommodates an airbag 11 of an airbag module 5 to reduce the deformation of the case 8 toward a back side in the event of airbag deployment. The back plate 7 is supported on a steering member or the case 8, and an upper portion of the back plate 7 is held on a back support 19 protruding from the instrument panel 1.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: April 8, 2014
    Assignees: DaikyoNishikawa Corporation, Mazda Motor Corporation
    Inventors: Toshiteru Yoshimura, Tsuyoshi Shimono, Daisuke Matsuoka, Yamehito Tamura, Koji Kuwabara, Masayoshi Ono, Hiroyuki Kawai, Kazuhiro Tanaka
  • Base station apparatus, user equipment terminal, and communication control method
    Patent number: 8560001
    Abstract: A base station apparatus includes a transmit diversity setting unit configured to set a transmit diversity mode to be applied to a user equipment terminal; a reception quality calculating unit configured to determine reception quality corresponding to the transmit diversity mode based on the transmit diversity mode set by the transmit diversity setting unit; a scheduling unit configured to determine a user equipment terminal to which a radio resource is to be allocated based on the reception quality determined by the reception quality calculating unit; and a notifying unit configured to notify the user equipment terminal to which the radio resource is allocated as determined by the scheduling unit of the transmit diversity mode to be applied.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: October 15, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Kawai, Akihito Morimoto, Hidekazu Taoka, Mamoru Sawahashi
  • SEPARATOR FOR NON-AQUEOUS BATTERIES AND NON-AQUEOUS BATTERY EQUIPPED WITH SAME, AND PROCESS FOR MANUFACTURING SEPARATOR FOR NON-AQUEOUS BATTERIES
    Publication number: 20130224557
    Abstract: Provided is a separator for non-aqueous batteries, capable of being usefully used in non-aqueous batteries, and a non-aqueous battery equipped with this separator. The separator for non-aqueous batteries includes: a base layer comprising a fiber aggregate, and an electrolyte-swellable resin layer formed on at least one surface of the base layer, the resin layer comprising a urethane resin (C) obtained by reacting a polyol (A) including a vinyl polymer (a1) and a polyether polyol (a2) with a polyisocyanate (B). The vinyl polymer (a1) has as a main chain a vinyl polymer (a1?) having two hydroxyl groups at one of the termini of the main chain, and a polyoxyethylene chain having a number average molecular weight of 200 to 800 as a side chain, the percentage of the polyoxyethylene chain based on the vinyl polymer (a1) being within the range of 70 mass % to 98 mass %.
    Type: Application
    Filed: October 13, 2011
    Publication date: August 29, 2013
    Applicant: KURARAY CO., LTD.
    Inventors: Tomohiro Hayakawa, Takayoshi Hosoya, Hiroyuki Kawai, Hideo Hayashi, Yutaka Hayashi, Kohsuke Togashi, Naotaka Gotoh
  • ALKALINE BATTERY SEPARATOR AND ALKALINE BATTERY USING SEPARATOR
    Publication number: 20130183569
    Abstract: Provided are an alkaline battery separator and an alkaline battery including the separator. The separator includes at least a coarse layer and a dense layer denser than the coarse layer. The coarse layer contains an alkaline-resistant cellulose fiber having a freeness value of 350 to 650 ml as a whole in the proportion of 25 to 65% by weight. The alkaline-resistant cellulose fiber includes at least two kinds of alkaline-resistant cellulose fibers having different freeness with each other. The difference in freeness value between the alkaline-resistant cellulose fibers having the highest and lowest freeness values is 300 to 700 ml. The dense layer contains an alkaline-resistant cellulose fiber which as a whole has a freeness value of 0 to 400 ml. The separator has a maximum pore size of 65 ?m or smaller, and a liquid absorption capacity of 5 g/g or higher.
    Type: Application
    Filed: September 6, 2011
    Publication date: July 18, 2013
    Applicant: KURARAY CO., LTD
    Inventors: Tomohiro Hayakawa, Koichi Kambe, Hiroyuki Kawai
  • Laminate, separator for capacitor, and capacitor
    Patent number: 8477480
    Abstract: Laminates including a nanofiber layer and a base layer, the nanofiber layer comprising polyamide filaments formed from a polyamide (a) and having an average fiber diameter of 10 to 1000 nm, and the base layer comprising fibers at least including polyamide fibers formed from a polyamide (a), where the polyamide (a) comprises a dicarboxylic acid unit and a diamine unit and where (i) the dicarboxylic acid unit comprising a terephthalic acid unit in the proportion of not lower than 60% by mole, and (ii) the diamine unit comprising at least one diamine unit selected from the group consisting of 1,9-nonanediamine unit and 2-methyl-1,8-octanediamine unit in the proportion of not lower than 60% by mole in total are provided, as well as separators for capacitors including the laminates.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: July 2, 2013
    Assignee: Kuraray Co., Ltd.
    Inventors: Tomohiro Hayakawa, Hideo Hayashi, Taketoshi Okuno, Nozomu Sugoh, Hideki Kamada, Hiroyuki Kawai, Shinya Inada
  • VEHICLE AIRBAG SYSTEM
    Publication number: 20130076010
    Abstract: A back plate 7 is provided to a backside of a case 8 which accommodates an airbag 11 of an airbag module 5 to reduce the deformation of the case 8 toward a back side in the event of airbag deployment. The back plate 7 is supported on a steering member or the case 8, and an upper portion of the back plate 7 is held on a back support 19 protruding from the instrument panel 1.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 28, 2013
    Applicants: MAZDA MOTOR CORPORATION, DAIKYONISHIKAWA CORPORATION
    Inventors: Toshiteru YOSHIMURA, Tsuyoshi SHIMONO, Daisuke MATSUOKA, Yumehito TAMURA, Koji KUWABARA, Masayoshi ONO, Hiroyuki KAWAI, Kazuhiro TANAKA
  • Mobile communication system, receiver and method
    Patent number: 8391128
    Abstract: A transmitter in a mobile communication system code-multiplexes transmission symbols together with spreading codes, performs inverse Fourier transform and transmits the result from multiple transmit antennas. A receiver in the mobile communication system performs Fourier transform on signals received at multiple receive antennas, extracts signal components of individual subcarriers and estimates symbols in accordance with a QR decomposition algorithm. A unitary matrix is derived such that a product of a spreading matrix including spreading elements as its elements and a channel matrix representing radio channel states is equal to a product of the unitary matrix and a triangular matrix. A reception vector, a unitary matrix and a triangular matrix are used to estimate symbol candidates transmitted from individual transmit antennas.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: March 5, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Kenichi Higuchi, Hiroyuki Kawai
  • Image forming apparatus and computer readable medium for forming image
    Patent number: 8368979
    Abstract: An image forming apparatus includes a tone correction storage unit that stores a plurality of tone correction charts for correcting tone of image data; a determination unit that determines characteristics of the image data; a selection unit that selects a tone correction chart suitable for the image data from the plurality of tone correction charts stored in the tone correction storage unit; a chart print unit that prints the tone correction chart selected by the selection unit on a sheet; a receiving unit that receives an adjustment value inputted based on the tone correction chart printed by the chart print unit; a tone correction unit that corrects tone of the image data based the adjustment value; and a print unit that prints out the image data after correcting tone of the image data.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: February 5, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kiyoshi Une, Takaya Nagasaki, Hiroyuki Kawai, Yasuo Komatsu, Seiji Shiraki, Takumi Nishikata
  • Image forming apparatus
    Patent number: 8294950
    Abstract: An image forming apparatus includes; a chart data forming unit that forms density correcting chart data to be printed, in which reference density patterns and adjusting density patterns are arranged so that a connection angle, and the adjusting density patterns have different densities in the respective patterns; a printing unit that prints a density correcting chart in which the reference density patterns and the adjusting density patterns are arranged adjacent to each other in respective patterns; a receiving unit that receives an input of a density adjusting value of a desired pattern, on the basis of comparison of density between the reference density patterns and the adjusting density patterns which has been obtained from visual observation of a user on the printed density correcting chart; and a tone correcting unit that conducts tone correction of the desired pattern.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: October 23, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Seiji Shiraki, Takaya Nagasaki, Hiroyuki Kawai, Yasuo Komatsu, Kiyoshi Une, Takumi Nishikata
  • RECEIVING APPARATUS AND INTERFERENCE POWER ESTIMATION METHOD
    Publication number: 20120178393
    Abstract: Provided are a receiving apparatus and an interference power estimation method that can perform interference power estimation with high accuracy even when correlation in a fading variation between reference signals is low and obtain accurate receiving quality. The interference power estimation method according to the present invention receives a plurality of discontinuous reference signals on the time/frequency plane, extracts the reference signals from the received signal, linear-combines channel variation values obtained from reference signals surrounding a reference signal of a specific time/frequency on the time/frequency plane with predetermined weighting and estimates interference power using the linear-combined value resulting from the linear combining.
    Type: Application
    Filed: August 12, 2010
    Publication date: July 12, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroyuki Kawai, Mototsugu Suzuki, Tetsuro Imai, Yoshihiro Ishikawa
  • SEPARATOR FOR NON-AQUEOUS BATTERIES, NON-AQUEOUS BATTERY USING SAME, AND PRODUCTION METHOD FOR SEPARATOR FOR NON-AQUEOUS BATTERIES
    Publication number: 20120164514
    Abstract: Provided is a separator for non-aqueous batteries not only having shutdown property but also achieving both higher output and short-circuit resistance. The separator comprising a laminate comprising: a low melting-point polymer fiber layer (A) having a melting point of 100 to 200° C., the low melting-point polymer fiber layer (A) comprising nanofibers having a fiber diameter of 1000 nm or smaller and formed from the low melting-point polymer; and a heat-resistant polymer fiber layer (B) positioned on the low melting-point polymer fiber layer (A) and comprising a high melting-point polymer having a melting point over 200° C. or a heat infusible polymer, the heat-resistant polymer fiber layer (B) comprising a mixture of nanofibers having a fiber diameter of 1000 nm or smaller and non-nanofibers having a fiber diameter over 1000 nm and both formed from heat-resistant polymer.
    Type: Application
    Filed: March 7, 2012
    Publication date: June 28, 2012
    Applicant: KURARAY CO., LTD.
    Inventors: Tomohiro Hayakawa, Hideo Hayashi, Hideki Kamada, Takayoshi Hosoya, Hiroyuki Kawai
  • CARBON NANOTUBE PRODUCTION PROCESS AND CARBON NANOTUBE PRODUCTION APPARATUS
    Publication number: 20120045572
    Abstract: A substrate 10 that selectively allows hydrogen to permeate therethrough is formed with a catalyst thin layer 20 on a first side 11 thereof and is heated in a furnace tube 110, which functions as a reactor, of a heating furnace 100 while a raw material gas to the catalyst thin layer 20 is fed. Hydrogen produced on the first side 11 of the substrate 10 as a result of the formation of carbon nanotubes 5 is separated from the raw material gas and is allowed to permeate to a second side 12 thereof.
    Type: Application
    Filed: April 8, 2010
    Publication date: February 23, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro Imanishi, Naoki Ito, Shigeaki Murata, Keisuke Nagasaka, Hiroyuki Kawai, Satoshi Nakazawa
  • Alkaline battery separator comprising alkali-resistance synthetic fiber, fibrillated organic solvent-spun cellulose fiber and mercerized pulp, and alkaline primary battery
    Patent number: 8097366
    Abstract: An alkaline battery separator including 25 to 62% by mass of an alkali-resistance synthetic fiber, 5 to 25% by mass of a fibrillated organic solvent-spun cellulose fiber having a Canadian standard freeness value of 10 to 280 ml, and 33 to 50% by mass of a mercerized pulp having a Canadian standard freeness value of not less than 550 ml, wherein the fibrillated organic solvent-spun cellulose fiber intertwines with the mercerized pulp.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: January 17, 2012
    Assignee: Kuraray Co., Ltd.
    Inventors: Toshimitsu Harada, Hisashi Nagi, Hiroyuki Kawai, Masakazu Nishiyama
  • FILTRATION MATERIAL FOR FILTERS, AND FILTER CARTRIDGE
    Publication number: 20110309014
    Abstract: The present invention relates to a filter material including a sheet-like laminate which includes an ultrafine fiber aggregate layer formed of an aggregate of ultrafine fibers produced by an electrospinning method having an average fiber diameter of not less than 10 nm and not more than 1000 nm, and a base material formed of a nonwoven fabric or a woven fabric constituted from fibers having an average fiber diameter of 1 ?m or more, said filter material satisfying all of a plurality of specific requirements, having a capability of collecting or separating ?m-order microfine particles with a high accuracy and exhibiting a less pressure loss and a long filtering life, as well as a filter cartridge using the filter material.
    Type: Application
    Filed: December 17, 2009
    Publication date: December 22, 2011
    Applicant: KURARAY CO., LTD.
    Inventors: Takayoshi Hosoya, Shinya Inada, Hideki Kamada, Hiroyuki Kawai
  • SEMICONDUCTOR DEVICE
    Publication number: 20110289293
    Abstract: There is provided a semiconductor device which is simple in configuration and resistant to tampering. A user input unit receives an authentication code input by a user. A CPU determines whether a user's access is legal based on the input authentication code and activates an enable signal if the user's access is legal. A normal row decoder decodes the row address specified by the CPU and selects a normal memory cell of any row based on the result of decode. A redundancy row decoder prohibits the selection by the normal row decoder when the specified row address agrees with the row address of a predetermined normal memory cell only if the enable signal is activated and selects a redundant memory cell of any row.
    Type: Application
    Filed: May 11, 2011
    Publication date: November 24, 2011
    Inventors: Yoshifumi KAWAMURA, Hirofumi NAKANO, Hiroyuki KAWAI
  • BASE STATION APPARATUS, USER EQUIPMENT AND PRECODING METHOD
    Publication number: 20110256897
    Abstract: The present invention provides a base station apparatus capable of preventing degrading of throughput performance even when feedback information amount on precoding in uplink MIMO transmission is reduced. This base station (200) has a scheduler (231) for determining resource blocks used in wireless communications with each mobile station (100) adaptively, a precoding weight selecting section (232) for selecting a precoding weight for controlling phase and/or amplitude of a transmission signal for each antenna in the mobile station (100) based on reception quality on uplink at the resource blocks determined to the mobile station (100); and transmission/reception sections (206a and 206b) for transmitting the determined precoding weight to the mobile station (100).
    Type: Application
    Filed: September 18, 2009
    Publication date: October 20, 2011
    Applicant: NTT DOCOMO, INC.
    Inventors: Hidekazu Taoka, Yuichi Kakishima, Hiroyuki Kawai, Kenichi Higuchi, Mamoru Sawahashi
  • Wireless communication system, receiving apparatus, modulating method for use therein, and program therefor
    Patent number: 7936838
    Abstract: It is an object to provide a receiving apparatus which is capable of demodulating signals with a very simple arrangement. Receiving apparatus 1 has N reception antennas 11-1-11-N, and reception antennas 11-1-11-N receive signals. Channel coefficient estimator 12 estimates and outputs channel coefficients from the signals received by respective reception antennas 11-1-11-N. QR decomposer 13 is supplied with a channel matrix having the channel coefficients as its elements, performs QR decomposition on the channel matrix, and outputs a Q matrix and an R matrix. A QH processor 14 is supplied with the Q matrix and the received signals, multiplies the received signals by a complex conjugate transposed matrix of the Q matrix, and outputs converted signal z. A transmitted sequence estimator 15 is supplied with converted signal z and the R matrix and estimates transmitted sequences.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: May 3, 2011
    Assignees: NEC Corporation, Fujitsu Limited, NTT DoCoMo, Inc.
    Inventors: Takumi Ito, Shousei Yoshida, Yoshikazu Kakura, Hiroyuki Seki, Hiroyuki Kawai, Kenichi Higuchi, Mamoru Sawahashi