Patents by Inventor Tomoyuki Tada

Tomoyuki Tada 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: 11242288
    Abstract: A sintered Ni ferrite body having a composition comprising, calculated as oxide, 47.0-48.3% by mol of Fe2O3, 14.5% or more and less than 25% by mol of ZnO, 8.2-10.0% by mol of CuO, and more than 0.6% and 2.5% or less by mol of CoO, the balance being NiO and inevitable impurities, and having an average crystal grain size of more than 2.5 ?m and less than 5.5 ?m.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: February 8, 2022
    Assignee: HITACHI METALS, LTD.
    Inventors: Satoru Tanaka, Norikazu Koyuhara, Tomoyuki Tada
  • Publication number: 20210373395
    Abstract: According to one embodiment, a display device including a first substrate including a first pixel and a second pixel, a second substrate, a liquid crystal layer containing polymer and liquid crystal molecules, and a light emitting element, wherein the second pixel is located between the light emitting element and the first pixel, the first substrate includes a switching element including a semiconductor layer arranged in the first pixel, a pixel electrode, and a first light shielding portion arranged in the second pixel and being adjacent to the semiconductor layer, the first light shielding portion is located between the semiconductor layer and the light emitting element in planar view and located on a side closer to the first pixel than a center of the second pixel.
    Type: Application
    Filed: August 16, 2021
    Publication date: December 2, 2021
    Inventors: Kentaro OKUYAMA, Yoshihide OHUE, Hiroki SUGIYAMA, Tomoyuki TADA
  • Publication number: 20210340053
    Abstract: The present invention relates to a bushing for producing glass fibers, including: a base plate; and multiple nozzles from which molten glass is discharged, in which a nozzle group formed with the alignment of the multiple nozzles is joined to the base plate. In the present invention, a coating layer made of ceramics is formed on each of the nozzles forming at least a row of the outermost layer of the nozzle group. The coating layer does not cover the entire nozzle, that is, the nozzle is covered so as to be in a state of no coating layer in the vicinity of the nozzle tip. The present invention is a bushing plate for producing glass fibers, with which the occurrence of irregular phenomena is suppressed and a uniform glass flow can be obtained stably over a long period of time.
    Type: Application
    Filed: September 6, 2019
    Publication date: November 4, 2021
    Applicant: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Tomoyuki TADA, Toshihiro OSAWA, Naoya NAGAO, Atsushi NAKAOKA
  • Publication number: 20210143550
    Abstract: A coil device comprising a coil, and a ferrite core arranged in a hollow portion of the coil, and a resin covering them; the ferrite core being a Ni ferrite core having initial permeability ?i of 450 or more at a frequency of 100 kHz and a temperature of 20° C., and an average crystal grain size of 5-9 ?m, both of temperature-dependent inductance change ratios TLa and TLb and stress-dependent inductance change ratios PLa and PLb being ?0.6% to +0.6%, and both of the sum of TLa and PLa and the sum of TLb and PLb being more than ?1.0% and less than +1.0%; and an antenna comprising it.
    Type: Application
    Filed: June 7, 2018
    Publication date: May 13, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Hiroki YAMAMOTO, Tomoyuki TADA, Satoru TANAKA
  • Publication number: 20210139377
    Abstract: A sintered Ni ferrite body having a composition comprising, calculated as oxide, 47.0-48.3% by mol of Fe2O3, 14.5% or more and less than 25% by mol of ZnO, 8.2-10.0% by mol of CuO, and more than 0.6% and 2.5% or less by mol of CoO, the balance being NiO and inevitable impurities, and having an average crystal grain size of more than 2.5 ?m and less than 5.5 ?m.
    Type: Application
    Filed: March 15, 2018
    Publication date: May 13, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Satoru TANAKA, Norikazu KOYUHARA, Tomoyuki TADA
  • Patent number: 10950375
    Abstract: A method for producing a MnZn ferrite core used at a frequency of 1 MHz or more and an exciting magnetic flux density of 75 mT or less, the MnZn ferrite comprising 53-56% by mol of Fe (calculated as Fe2O3), and 3-9% by mol of Zn (calculated as ZnO), the balance being Mn (calculated as MnO), as main components, and 0.05-0.4 parts by mass of Co (calculated as Co3O4) as a sub-component, per 100 parts by mass in total of the main components (calculated as the oxides); comprising a step of molding a raw material powder for the MnZn ferrite to obtain a green body; a step of sintering the green body and cooling it to a temperature of lower than 150° C. to obtain a sintered body of MnZn ferrite; and a step of conducting a heat treatment comprising heating the sintered body of MnZn ferrite to a temperature meeting Condition 1 of 200° C. or higher, and Condition 2 of (Tc?90)° C. to (Tc+100)° C., wherein Tc is a Curie temperature (° C.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 16, 2021
    Assignee: HITACHI METALS. LTD.
    Inventors: Norikazu Koyuhara, Yasuharu Miyoshi, Tomoyuki Tada, Satoru Tanaka
  • Patent number: 10937579
    Abstract: A method for producing MnZn-ferrite comprising Fe, Mn and Zn as main components, and at least Co, Si and Ca as sub-components, the main components in the MnZn-ferrite comprising 53-56% by mol (as Fe2O3) of Fe, and 3-9% by mol (as ZnO) of Zn, the balance being Mn as MnO, comprising the step of sintering a green body to obtain MnZn-ferrite; the sintering comprising a temperature-elevating step, a high-temperature-keeping step, and a cooling step; the high-temperature-keeping step being conducted at a keeping temperature of higher than 1050° C. and lower than 1150° C. in an atmosphere having an oxygen concentration of 0.4-2% by volume; the oxygen concentration being in a range of 0.001-0.2% by volume during cooling from 900° C. to 400° C. in the cooling step; and the cooling speed between (Tc+70)° C. and 100° C. being 50° C./hour or more, wherein Tc represents a Curie temperature (° C.) calculated from % by mass of Fe2O3 and ZnO.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: March 2, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Norikazu Koyuhara, Yasuharu Miyoshi, Tomoyuki Tada, Satoru Tanaka
  • Patent number: 10919809
    Abstract: A method for producing MnZn ferrite comprising Fe, Mn and Zn as main components, and Ca, Si and Co, and at least one selected from the group consisting of Ta, Nb and Zr as sub-components, comprising a step of molding a raw material powder for the MnZn ferrite to obtain a green body, and a step of sintering the green body; the sintering step comprising a temperature-elevating step, a high-temperature-keeping step, and a cooling step; the cooling step including a slow cooling step of cooling in a temperature range of 1100° C. to 1250° C. at a cooling speed of 0° C./hour to 20° C./hour for 1 hours to 20 hours, and a cooling speed before and after the slow cooling step being higher than 20° C./hour; the MnZn ferrite having a volume resistivity of 8.5 ?·m or more at room temperature, an average crystal grain size of 7 ?m to 15 ?m, and core loss of 420 kW/m3 or less between 23° C. and 140° C. at a frequency of 100 kHz and an exciting magnetic flux density of 200 mT.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: February 16, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Yasuharu Miyoshi, Norikazu Koyuhara, Tomoyuki Tada
  • Publication number: 20200373047
    Abstract: A sintered MnZn ferrite body containing main components comprising 53.30-53.80% by mol of Fe calculated as Fe2O3, 6.90-9.50% by mol Zn calculated as ZnO, and the balance of Mn calculated as MnO, and sub-components comprising 0.003-0.020 parts by mass of Si calculated as SiO2, more than 0 parts and 0.35 parts or less by mass of Ca calculated as CaCO3, 0.30-0.50 parts by mass of Co calculated as Co3O4, 0.03-0.10 parts by mass of Zr calculated as ZrO2, and 0-0.05 parts by mass of Ta calculated as Ta2O5, pre 100 parts by mass in total of the main components (calculated as the oxides), and having an average crystal grain size of 3 ?m or more and less than 8 ?m and a density of 4.65 g/cm3 or more.
    Type: Application
    Filed: March 27, 2018
    Publication date: November 26, 2020
    Applicant: HITACHI METALS, LTD.
    Inventors: Yasuharu MIYOSHI, Tomoyuki TADA, Norikazu KOYUHARA
  • Publication number: 20200166796
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a liquid crystal layer including polymers and liquid crystal molecules, and a light-emitting element. The first substrate includes a transparent substrate, a scanning line, a signal line crossing the scanning line, a switching element electrically connected to the scanning line and the signal line, an organic insulating film overlapping the switching element, and a pixel electrode electrically connected to the switching element. A thickness of the organic insulating film located between the transparent substrate and the pixel electrode is less than a thickness of the organic insulating film overlapping the switching element.
    Type: Application
    Filed: November 20, 2019
    Publication date: May 28, 2020
    Applicant: Japan Display Inc.
    Inventors: Kentaro OKUYAMA, Yoshihide OHUE, Hiroki SUGIYAMA, Tomoyuki TADA
  • Patent number: 10304602
    Abstract: Provided are: a MnZn-based ferrite which allows to have a low magnetic core loss and to suppress a time-dependent change of magnetic property under a high-temperature environment by a control of ambient oxygen concentration and an increase of the magnetic core loss, and a method for manufacturing the same. The MnZn-based ferrite is characterized in that Fe ranges from 53.25 mol % or more to 54.00 mol % or less on the basis of Fe2O3, Zn ranges from 2.50 mol % or more to 8.50 mol % or less on the basis of ZnO and Mn is the remainder on the basis of MnO, Si ranges from more than 0.001 mass % to less than 0.02 mass % on the basis of SiO2, Ca ranges from more than 0.04 mass % to less than 0.4 mass % on the basis of CaCO3, Co is less than 0.5 mass % on the basis of Co3O4, Bi is less than 0.05 mass % on the basis of Bi2O3, Ta is less than 0.05 mass % on the basis of Ta2O5, Nb is less than 0.05 mass % on the basis of Nb2O5, Ti is less than 0.3 mass % on the basis of TiO2, and Sn is less than 0.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: May 28, 2019
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tomoyuki Tada, Yasuharu Miyoshi, Norikazu Koyuhara
  • Publication number: 20190096554
    Abstract: A method for producing a MnZn ferrite core used at a frequency of 1 MHz or more and an exciting magnetic flux density of 75 mT or less, the MnZn ferrite comprising 53-56% by mol of Fe (calculated as Fe2O3), and 3-9% by mol of Zn (calculated as ZnO), the balance being Mn (calculated as MnO), as main components, and 0.05-0.4 parts by mass of Co (calculated as Co3O4) as a sub-component, per 100 parts by mass in total of the main components (calculated as the oxides); comprising a step of molding a raw material powder for the MnZn ferrite to obtain a green body; a step of sintering the green body and cooling it to a temperature of lower than 150° C. to obtain a sintered body of MnZn ferrite; and a step of conducting a heat treatment comprising heating the sintered body of MnZn ferrite to a temperature meeting Condition 1 of 200° C. or higher, and Condition 2 of (Tc?90)° C. to (Tc+100) ° C., wherein Tc is a Curie temperature (° C.
    Type: Application
    Filed: March 24, 2017
    Publication date: March 28, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Norikazu KOYUHARA, Yasuharu MIYOSHI, Tomoyuki TADA, Satoru TANAKA
  • Publication number: 20190062217
    Abstract: A method for producing MnZn ferrite comprising Fe, Mn and Zn as main components, and Ca, Si and Co, and at least one selected from the group consisting of Ta, Nb and Zr as sub-components, comprising a step of molding a raw material powder for the MnZn ferrite to obtain a green body, and a step of sintering the green body; the sintering step comprising a temperature-elevating step, a high-temperature-keeping step, and a cooling step; the cooling step including a slow cooling step of cooling in a temperature range of 1100° C. to 1250° C. at a cooling speed of 0° C./hour to 20° C./hour for 1 hours to 20 hours, and a cooling speed before and after the slow cooling step being higher than 20° C./hour; the MnZn ferrite having a volume resistivity of 8.5 ?·m or more at room temperature, an average crystal grain size of 7 ?m to 15 ?m, and core loss of 420 kW/m3 or less between 23° C. and 140° C. at a frequency of 100 kHz and an exciting magnetic flux density of 200 mT.
    Type: Application
    Filed: March 24, 2017
    Publication date: February 28, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Yasuharu MIYOSHI, Norikazu KOYUHARA, Tomoyuki TADA
  • Publication number: 20180171104
    Abstract: A polyacetal resin composition containing 100 parts by weight of a polyacetal resin; from 0.01 part by weight to 0.5 part by weight (inclusive) of a hindered phenolic antioxidant; from 0.002 part by weight to 0.02 part by weight (inclusive) of an aliphatic carboxylic acid containing 2 or more carboxyl groups and having 4 or more carbon atoms; and from 0.01 part by weight to 0.1 part by weight (inclusive) of a fatty acid calcium salt. The molar ratio of the fatty acid calcium salt to the aliphatic carboxylic acid may be from 0.5 to 5 (inclusive).
    Type: Application
    Filed: March 2, 2016
    Publication date: June 21, 2018
    Inventors: Tomohiro MONMA, Hatsuhiko HARASHINA, Tomoyuki TADA
  • Publication number: 20170352455
    Abstract: A method for producing MnZn-ferrite comprising Fe, Mn and Zn as main components, and at least Co, Si and Ca as sub-components, the main components in the MnZn-ferrite comprising 53-56% by mol (as Fe2O3) of Fe, and 3-9% by mol (as ZnO) of Zn, the balance being Mn as MnO, comprising the step of sintering a green body to obtain MnZn-ferrite; the sintering comprising a temperature-elevating step, a high-temperature-keeping step, and a cooling step; the high-temperature-keeping step being conducted at a keeping temperature of higher than 1050° C. and lower than 1150° C. in an atmosphere having an oxygen concentration of 0.4-2% by volume; the oxygen concentration being in a range of 0.001-0.2% by volume during cooling from 900° C. to 400° C. in the cooling step; and the cooling speed between (Tc+70)° C. and 100° C. being 50° C./hour or more, wherein Tc represents a Curie temperature (° C.) calculated from % by mass of Fe2O3 and ZnO.
    Type: Application
    Filed: December 24, 2015
    Publication date: December 7, 2017
    Applicant: HITACHI METALS, LTD.
    Inventors: Norikazu KOYUHARA, Yasuharu MIYOSHI, Tomoyuki TADA, Satoru TANAKA
  • Publication number: 20170278607
    Abstract: Provided are: a MnZn-based ferrite which allows to have a low magnetic core loss and to suppress a time-dependent change of magnetic property under a high-temperature environment by a control of ambient oxygen concentration and an increase of the magnetic core loss, and a method for manufacturing the same. The MnZn-based ferrite is characterized in that Fe ranges from 53.25 mol % or more to 54.00 mol % or less on the basis of Fe2O3, Zn ranges from 2.50 mol % or more to 8.50 mol % or less on the basis of ZnO and Mn is the remainder on the basis of MnO, Si ranges from more than 0.001 mass % to less than 0.02 mass % on the basis of SiO2, Ca ranges from more than 0.04 mass % to less than 0.4 mass % on the basis of CaCO3, Co is less than 0.5 mass % on the basis of Co3O4, Bi is less than 0.05 mass % on the basis of Bi2O3, Ta is less than 0.05 mass % on the basis of Ta2O5, Nb is less than 0.05 mass % on the basis of Nb2O5, Ti is less than 0.3 mass % on the basis of TiO2, and Sn is less than 0.
    Type: Application
    Filed: August 31, 2015
    Publication date: September 28, 2017
    Applicant: Hitachi Metals, Ltd.
    Inventors: Tomoyuki Tada, Yasuharu Miyoshi, Norikazu Koyuhara
  • Patent number: 9651478
    Abstract: The analyzer according to the embodiment comprises an irradiation optical part that irradiates a mixture inside reaction tubes with light from a light source. Moreover, a detection optical part detects light transmitted through the mixture. Moreover, the irradiation optical part comprises a first optical element in which the light source is disposed at the front focal position and that concentrates light from the light source. Moreover, a second optical element guides light transmitted through the first optical element to the reaction tubes. In addition, an incident numerical aperture adjustment member is provided at the rear side of the first optical element and adjusts the numerical aperture when light from the light source is incident on the reaction tubes.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: May 16, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Shoichi Kanayama, Tomoyuki Tada, Naotada Okada
  • Patent number: 9434622
    Abstract: A sintered ferrite material, which is obtained by adding Bi2O3 in a range from 0.5% by mass to 3% by mass against 100% by mass of a material having a composition formula of (1-x-y-z)(Li0.5Fe0.5)O.xZnO.yFe2O3.zCuO wherein x, y and z satisfy 0.14?x?0.19, 0.48?y<0.5 and 0?z?0.03 and satisfies resistivity equal to or higher than 106 ?m, initial permeability equal to or higher than 200 and saturation magnetic flux density equal to or higher than 430 mT at 23° C. and equal to or higher than 380 mT at 100° C.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: September 6, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tomoyuki Tada, Yasuharu Miyoshi
  • Patent number: 9368805
    Abstract: The present invention provides a catalyst for a polymer electrolyte fuel cell including catalyst particles made of platinum supported on a carbon powder carrier, wherein the carbon powder carrier includes 0.7 to 3.0 mmol/g (based on the weight of the carrier) of a hydrophilic group bonded thereto; and the platinum particles have an average particle size of 3.5 to 8.0 nm and the platinum specific surface area based on CO adsorption (COMSA) of 40 to 100 m2/g. The catalyst for a polymer electrolyte fuel cell according to the present invention is a catalyst excellent in initial activity and satisfactory in durability.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: June 14, 2016
    Assignee: TANAKA KIKINZOKU KOGYO K.K
    Inventors: Tomoyuki Tada, Koichi Matsutani, Takeshi Kaieda, Katsuichiro Hayakawa, Hitoshi Nakajima
  • Patent number: 8570142
    Abstract: An evaluation processing portion changes a user level of a user, in a user level storing portion, to a value that is equal to a region level when an evaluation result indicates that entry is authorized.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: October 29, 2013
    Assignee: Azbil Corporation
    Inventor: Tomoyuki Tada