Patents by Inventor Hiroshi Nakatani

Hiroshi Nakatani 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: 11967328
    Abstract: A sound source separation filter information estimation device (10) estimates a covariance matrix having information on a correlation between sound source spectra and information on a correlation between channels as information on sound source separation filter information for separating an individual sound source signal from a mixed acoustic signal.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: April 23, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Rintaro Ikeshita, Nobutaka Ito, Tomohiro Nakatani, Hiroshi Sawada
  • Publication number: 20240127841
    Abstract: An acoustic signal enhancement device includes: a spatiotemporal covariance matrix estimation unit 2 configured to estimate spatiotemporal covariance matrices Rf(j) and Pf(j); a reverberation suppression unit 3 configured to obtain a reverberation suppression filter Gf(j) of the sound source j using the estimated spatiotemporal covariance matrices Rf(j) and Pf(j) for each sound source j and to generate a reverberation suppression signal vector using the obtained reverberation suppression filter Gf(j) and the observation signal vector Xt,f; a sound source separation unit 4 configured to obtain an enhanced sound yt,f(j) of the sound source j and power of the sound source j using the generated reverberation suppression signal vector for each sound source j (where 1?j?J) corresponding to the target sound; and a control unit 5 configured to perform control such that processes of these units are repeatedly performed.
    Type: Application
    Filed: February 25, 2021
    Publication date: April 18, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomohiro NAKATANI, Rintaro IKESHITA, Keisuke KINOSHITA, Hiroshi SAWADA, Shoko ARAKI
  • Patent number: 11915717
    Abstract: The signal separation device includes: cross product calculation means receiving an input of an observed signal that is a mixture of a plurality of target signals, and calculating a cross product of the observed signal; model calculation means updating a parameter of a model for estimating the cross product with a predetermined algorithm using an inverse matrix of a matrix that represents an estimate of the cross product; inverse matrix calculation means calculating the inverse matrix of a matrix by a SIMD command when the parameter is updated; and separation means calculating the target signals using a matrix representing an estimate of the cross product, the updated parameter, and the observed signal.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: February 27, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroshi Sawada, Rintaro Ikeshita, Nobutaka Ito, Tomohiro Nakatani
  • Patent number: 11698048
    Abstract: The utility vehicle includes a body; a frame that supports the body; an on-board device that is mounted on the frame and requires outside air; and an air intake conduit that is connected to the on-board device. An air intake port of the air intake conduit that sucks in outside air faces a center side of the utility vehicle.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: July 11, 2023
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Yoshihiko Inagaki, Hiroshi Nakatani
  • Publication number: 20220333564
    Abstract: The utility vehicle includes a body; a frame that supports the body; an on-board device that is mounted on the frame and requires outside air; and an air intake conduit that is connected to the on-board device. An air intake port of the air intake conduit that sucks in outside air faces a center side of the utility vehicle.
    Type: Application
    Filed: April 16, 2021
    Publication date: October 20, 2022
    Inventors: Yoshihiko INAGAKI, Hiroshi NAKATANI
  • Publication number: 20220123705
    Abstract: A piezoelectric resonator unit that includes a base, a cover, and a laminated structure disposed between the base and the cover. The laminated structure includes a piezoelectric resonator having a piezoelectric layer with a pair of principal surfaces facing each other, and a pair of excitation electrodes disposed on respective surfaces of the pair of principal surfaces so as to face each other with the piezoelectric layer therebetween, a semiconductor layer laminated on a side of one of the pair of principal surfaces of the piezoelectric layer, and a pair of measurement electrodes provided on the semiconductor layer. The pair of measurement electrodes measure signals based on temperature of the piezoelectric resonator through the semiconductor layer.
    Type: Application
    Filed: January 4, 2022
    Publication date: April 21, 2022
    Inventors: Eitaro KAMEDA, Keisuke TAKEYAMA, Toshio NISHIMURA, Hiroshi NAKATANI
  • Patent number: 11099494
    Abstract: Provided is a magenta toner which is more excellent in durability in a high temperature and high humidity environment than conventional ones. The magenta toner comprises a binder resin, a magenta colorant, a release agent and an external additive. The release agent has a maximum endothermic peak in a range of from 70° C. to 80° C. during temperature increase, in a DSC curve measured by a differential scanning calorimeter. Needle-shaped oxide fine particles having an average long diameter of from 30 nm to 500 nm and an aspect ratio of from 4 to 20 are contained therein. Zinc stearate particles having a number average primary particle diameter of from 0.1 ?m to 5 ?m are contained at an amount of from 0.01 part by mass to 0.5 part by mass with respect to 100 parts by mass of the colored resin particles, as the external additives.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: August 24, 2021
    Assignee: ZEON CORPORATION
    Inventors: Mayuka Chiba, Hiroshi Nakatani
  • Patent number: 10895211
    Abstract: A reference range identifying device acquires and records, at a predetermined time interval, a measuring result of a load and exhaust temperature of an engine. The device identifies, based on combinations of the load and exhaust temperature recorded at multiple points of time, for each load zone, for example a 95% confidence interval of a distribution of exhaust temperatures as a reference range. Subsequently, the device calculates an approximate curve for lower limits and upper limits of reference ranges identified for the load zones. The device identifies a range sandwiched by the calculated two approximate curves as a reference range that changes in accordance with a load. The device, upon detecting that a current load and exhaust temperature of the engine is not included in the reference range, notifies the detected fact to a user.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: January 19, 2021
    Assignee: Nippon Yusen Kabushiki Kaisha
    Inventors: Takashi Mishima, Kanefumi Uematsu, Masahiro Shibaoka, Hiroshi Nakatani, Tomoo Oishi, Masayuki Kozuka
  • Publication number: 20200285165
    Abstract: Provided is a magenta toner which is more excellent in durability in a high temperature and high humidity environment than conventional ones. The magenta toner comprises a binder resin, a magenta colorant, a release agent and an external additive, wherein a compound A, a compound B and a compound C each having a specific chemical structure are contained as the magenta colorant, and wherein the release agent has a maximum endothermic peak in a range of from 70° C. to 80° C. during temperature increase, in a DSC curve measured by a differential scanning calorimeter.
    Type: Application
    Filed: March 26, 2018
    Publication date: September 10, 2020
    Applicant: ZEON CORPORATION
    Inventors: Mayuka Chiba, Hiroshi Nakatani
  • Patent number: 10730593
    Abstract: A first unit acquires attribute record data and a second unit acquires deterioration degree data from a terminal device mounted on a ship. The attribute record data indicates an attribute relating to a past sailing of the ship. The deterioration degree data indicates a deterioration degree, which is checked during performance of maintenance work, of each device mounted on the ship. A third unit generates relational data indicating a relation between various attributes relating to the state of the sailing of the ship and the deterioration degree of the device based on the attribute record data and deterioration degree data. A fourth unit acquires estimated attribute data indicating an estimated value of the attributes relating to sailing of the ship. A fifth unit generates timing data indicating a timing of maintenance work to be performed on each device based on the attribute record data, estimated attribute data, and relational data.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: August 4, 2020
    Assignee: NIPPON YUSEN KABUSHIKI KAISHA
    Inventors: Takashi Mishima, Kanefumi Uematsu, Masahiro Shibaoka, Hiroshi Nakatani, Tomoo Oishi, Masayuki Kozuka
  • Patent number: 10530332
    Abstract: A resonator is provided that suppresses vibration of a retainer caused by undesired vibration of a vibrating portion and also achieves size reduction. Specifically, the resonator includes a vibrating member that includes a semiconductor layer, a first piezoelectric film formed on the semiconductor layer, and a first upper electrode formed on the first piezoelectric film. Moreover, a retainer is provided to retain the vibrating member such that the vibrating portion can vibrate and one or more coupling members are provided to couple the vibrating member to the retainer. Finally, the resonator includes a vibration suppressing member that includes a second piezoelectric film formed on the retainer and a second upper electrode formed on the second piezoelectric film.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: January 7, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Daisuke Nakamura, Hiroshi Nakatani
  • Patent number: 10459358
    Abstract: Disclosed is a method for producing a toner comprising combining a binder resin, a wax, a negatively-chargeable charge control resin and a colorant to form the toner, prior to said combining, the negatively-chargeable charge control resin is obtained by drying treatment conducted for 2 to 24 hours under conditions of a drying temperature of 45 to 80° C. and a pressure of 0.5 to 20 kPa, wherein the negatively-chargeable charge control resin comprises a monomer unit having a functional group that imparts a negative charging property, a vinyl aromatic hydrocarbon monomer unit, and a (meth)acrylate monomer unit.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: October 29, 2019
    Assignee: ZEON CORPORATION
    Inventors: Takeru Chiba, Hiroshi Nakatani
  • Publication number: 20190039473
    Abstract: A charging device according to one embodiment includes a charging unit, a measuring unit, and a detecting unit. The detecting unit detects an angle of inclination of a vehicle with respect to a longitudinal direction based on a first difference, a distance, and a first angle, the first difference being a difference between a first vertical distance to a first point in a first plane and a second vertical distance to a second point in the first plane having a position in a traveling direction different from that of the first point, the distance being a distance between the first point and the second point.
    Type: Application
    Filed: December 19, 2016
    Publication date: February 7, 2019
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Jun TAKEHARA, Fumiyasu MIYOSHI, Hiroshi NAKATANI, Tooru TAKANAKA
  • Patent number: 10175594
    Abstract: There is provided a toner set including a yellow toner, a cyan toner and a magenta toner, the toners each comprising an external additive and colored resin particles comprising a binder resin, a colorant and a charge control agent. An absolute value of an average of q/d for any of the yellow, cyan and magenta toners is expressed by charge amount q (fC) and particle diameter d (?m). It is obtained by measurement using an electric field detachment-type charge amount distribution measurement device. It is in a range of 2.0 to 6.5 fC/10 ?m, and a standard deviation (SD) of q/d is 13 fC/10 ?m or less. A difference between average values of q/d for any two of the yellow, cyan and magenta toners is 2.0 fC/10 ?m or less. A difference (?SD) between standard deviations of q/d for the two toners is 5.0 fC/10 ?m or less.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: January 8, 2019
    Assignee: ZEON CORPORATION
    Inventors: Hiroshi Nakatani, Takeru Chiba
  • Patent number: 10133217
    Abstract: A transfer device includes a transfer roller, a stripping electrode, and a protective member. The transfer roller transfers a toner image formed on an image bearing member to a sheet in a transfer position. The stripping electrode is arranged downstream from the transfer position to which the sheet is to be carried. The stripping electrode includes a plurality of needle electrodes. The protective member is arranged on the transfer roller side with respect to the stripping electrode and overlaid on the stripping electrode. The protective member includes a cutout provided in a position facing at least one of the needle electrodes.
    Type: Grant
    Filed: September 9, 2017
    Date of Patent: November 20, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroshi Nakatani
  • Publication number: 20180307149
    Abstract: Disclosed is a method for producing a toner comprising combining a binder resin, a wax, a negatively-chargeable charge control resin and a colorant to form the toner, prior to said combining, the negatively-chargeable charge control resin is obtained by drying treatment conducted for 2 to 24 hours under conditions of a drying temperature of 45 to 80° C. and a pressure of 0.5 to 20 kPa, wherein the negatively-chargeable charge control resin comprises a monomer unit having a functional group that imparts a negative charging property, a vinyl aromatic hydrocarbon monomer unit, and a (meth)acrylate monomer unit.
    Type: Application
    Filed: June 28, 2018
    Publication date: October 25, 2018
    Applicant: ZEON CORPORATION
    Inventors: Takeru Chiba, Hiroshi Nakatani
  • Publication number: 20180224762
    Abstract: There is provided a toner set including a yellow toner, a cyan toner and a magenta toner, the toners each comprising an external additive and colored resin particles comprising a binder resin, a colorant and a charge control agent. An absolute value of an average of q/d for any of the yellow, cyan and magenta toners is expressed by charge amount q (fC) and particle diameter d (?m). It is obtained by measurement using an electric field detachment-type charge amount distribution measurement device. It is in a range of 2.0 to 6.5 fC/10 ?m, and a standard deviation (SD) of q/d is 13 fC/10 ?m or less. A difference between average values of q/d for any two of the yellow, cyan and magenta toners is 2.0 fC/10 ?m or less. A difference (?SD) between standard deviations of q/d for the two toners is 5.0 fC/10 ?m or less.
    Type: Application
    Filed: April 5, 2018
    Publication date: August 9, 2018
    Applicant: ZEON CORPORATION
    Inventors: Hiroshi Nakatani, Takeru Chiba
  • Patent number: 10012917
    Abstract: There is provided a toner comprising a binder resin, a wax, a charge control resin and a colorant. As a result of gas chromatography analysis, a first total amount of components detected in a range of a peak detecting time of hydrocarbons having 5 to 9 carbons is 500 ppm or less in terms of styrene; a second total amount of components detected in a range of a peak detecting time of hydrocarbons having 10 to 18 carbons is 5,000 ppm or less in terms of styrene; and an amount of a component corresponding to a maximum peak of peaks of hydrocarbons having 10 to 18 carbons is 3,000 ppm or less in terms of styrene.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: July 3, 2018
    Assignee: ZEON CORPORATION
    Inventors: Takeru Chiba, Hiroshi Nakatani
  • Patent number: 9983493
    Abstract: The present invention is to provide a toner which is able to inhibit the occurrence of fog, which is excellent in intermittent endurance, and which is excellent in followability during toner transfer and is thus excellent in top edge part uniformity in solid pattern printing. Disclosed is a toner for developing electrostatic images, comprising colored resin particles containing a binder resin, a colorant and a release agent, and an external additive, wherein static and kinetic friction coefficients obtained by measuring, using a 3-mm-diameter stainless-steel ball as a contactor, a 55-mm-diameter disk-shaped pellet obtained by pressing 4 g of the toner at 9 MPa for one minute, are 0.220 to 0.320 and 0.190 to 0.270, respectively, and a difference calculated by subtracting the kinetic friction coefficient from the static friction coefficient is 0.010 to 0.090.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: May 29, 2018
    Assignee: ZEON CORPORATION
    Inventors: Hiroshi Nakatani, Takeru Chiba
  • Publication number: 20180118312
    Abstract: A first unit acquires attribute record data and a second unit acquires deterioration degree data from a terminal device mounted on a ship. The attribute record data indicates an attribute relating to a past sailing of the ship. The deterioration degree data indicates a deterioration degree, which is checked during performance of maintenance work, of each device mounted on the ship. A third unit generates relational data indicating a relation between various attributes relating to the state of the sailing of the ship and the deterioration degree of the device based on the attribute record data and deterioration degree data. A fourth unit acquires estimated attribute data indicating an estimated value of the attributes relating to sailing of the ship. A fifth unit generates timing data indicating a timing of maintenance work to be performed on each device based on the attribute record data, estimated attribute data, and relational data.
    Type: Application
    Filed: April 14, 2015
    Publication date: May 3, 2018
    Applicant: NIPPON YUSEN KABUSHIKI KAISHA
    Inventors: Takashi MISHIMA, Kanefumi UEMATSU, Masahiro SHIBAOKA, Hiroshi NAKATANI, Tomoo OISHI, Masayuki KOZUKA