Patents by Inventor Tadahiro Imada

Tadahiro Imada 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: 10603617
    Abstract: A microwave irradiation apparatus includes: an annular microwave transmission path; a first microwave generation circuit that is coupled with the microwave transmission path and generates a first microwave; and a second microwave generation circuit that is coupled with the microwave transmission path and generates a second microwave; wherein the first microwave and the second microwave have frequencies equal to each other but have phases different from each other.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: March 31, 2020
    Assignee: FUJITSU Limited
    Inventor: Tadahiro Imada
  • Patent number: 10577992
    Abstract: A disclosed microwave heating apparatus includes a casing part configured to accommodate an object to be heated; a microwave generator configured to generate a microwave; an electromagnetic wave generator configured to generate an electromagnetic wave whose frequency is different from that of the microwave; an electromagnetic wave sensor configured to measure power of the electromagnetic wave, the power of the electromagnetic wave being measured after the electromagnetic wave incident on the casing part from the electromagnetic wave generator has passed through the object to be heated; and a controller configured to control, based on the power measured in the electromagnetic wave sensor, the microwave generator to generate the microwave.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: March 3, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Tadahiro Imada, Katsusada Motoyoshi, Tatsuya Hirose, Yoichi Kawano
  • Patent number: 10576406
    Abstract: There is provided an exhaust purification device including a particulate filter configured to collect particulates contained in an exhaust gas, an oxidation catalyst disposed in a front stage of the particulate filter and configured to have a carrier partially or entirely made of a material which absorbs a microwave, a housing in which the particulate filter and the oxidation catalyst are arranged, and a microwave generator configured to generate a microwave to be irradiated onto the oxidation catalyst in a direction to which the exhaust gas flows.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: March 3, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Patent number: 10526943
    Abstract: A disclosed microwave heating apparatus includes a casing part configured to accommodate an object to be heated; a microwave generator configured to generate a microwave; an electromagnetic wave generator configured to generate an electromagnetic wave whose frequency is different from that of the microwave; an electromagnetic wave sensor configured to measure power of the electromagnetic wave, the power of the electromagnetic wave being measured after the electromagnetic wave incident on the casing part from the electromagnetic wave generator has passed through the object to be heated; and a controller configured to control, based on the power measured in the electromagnetic wave sensor, the microwave generator to generate the microwave.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: January 7, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Tadahiro Imada, Katsusada Motoyoshi, Tatsuya Hirose, Yoichi Kawano
  • Patent number: 10526944
    Abstract: A filter regeneration device includes a microwave radiator configured to radiate a microwave and disposed to be oriented in a direction toward a ceramic filter configured to purify exhaust gas of an internal combustion engine, the ceramic filter being disposed in a cylindrical portion of a metallic case having the cylindrical portion and having a protruding portion protruding toward an outside of the cylindrical portion of the metallic case, the microwave radiator being disposed inside the protruding portion, and a microwave generator configured to generate the microwave radiated from the microwave radiator toward the ceramic filter.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: January 7, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Patent number: 10453948
    Abstract: A transistor which includes an electron transit layer and an electron supply layer which are stacked in a thickness direction of a substrate; an electron transit layer formed over the substrate in parallel to the electron transit layer and the electron supply layer; an anode electrode which forms a Schottky junction with the electron transit layer; and a cathode electrode which forms an ohmic junction with the electron transit layer are provided. The anode electrode is connected to a source of the transistor, and the cathode electrode is connected to a drain of the transistor.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: October 22, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Patent number: 10301989
    Abstract: A microwave applicator includes a housing configured to contain an object of heating, multiple microwave resonators provided on and around a periphery of the housing, a microwave conductor interconnecting the microwave resonators, and a microwave generator configured to generate microwaves of different frequencies. Each microwave resonator is configured to resonate the generated microwaves of a resonant frequency of the microwave resonator, and to emit the resonated microwaves to the object of heating contained in the housing. Among the microwave resonators, a first microwave resonator and a second microwave resonator have respective resonant frequencies that are different from each other.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 28, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Patent number: 10270406
    Abstract: A power amplifier includes a main amplifier, an auxiliary amplifier, and a control circuit. The main amplifier is configured to amplify input power, and the auxiliary amplifier is configured to amplify the input power when the input power exceeds a certain level. The control circuit, which is provided between a source of the main amplifier and a ground, is configured to control a source potential of the main amplifier so as to increase the source potential when the input power reaches at least a certain value.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: April 23, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Masato Nishimori, Tatsuya Hirose, Ikuo Soga, Masayuki Hosoda, Tadahiro Imada
  • Patent number: 10221739
    Abstract: A particulate filter includes a particulate capturing body configured to capture particulates contained in exhaust gas, and a dielectric waveguide provided around the particulate capturing body. The effective relative permittivity of the dielectric waveguide is higher than the effective relative permittivity of the particulate capturing body.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: March 5, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Tadahiro Imada, Yoichi Kawano
  • Publication number: 20180339256
    Abstract: An antenna including an antenna electrode that transmits or receives microwaves, and a covering layer that supports an oxidation catalyst, that is formed from an inorganic material, and that covers the antenna electrode.
    Type: Application
    Filed: May 23, 2018
    Publication date: November 29, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Masato Nishimori, Tadahiro Imada
  • Patent number: 10108263
    Abstract: The present application aims at restraining an erroneous input to an input apparatus fitted to a hand for use. The input apparatus includes a touch input accepting circuit to be attached to at least any one of five fingers of a hand, and an input cancelling circuit to cancel an input to the input accepting circuit upon touching the input accepting circuit, the input cancelling circuit being attached to a finger neighboring to the finger, with the input accepting circuit attached, of the five fingers.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: October 23, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Publication number: 20180280856
    Abstract: There is provided an exhaust purification device including a particulate filter configured to collect particulates contained in an exhaust gas, an oxidation catalyst disposed in a front stage of the particulate filter and configured to have a carrier partially or entirely made of a material which absorbs a microwave, a housing in which the particulate filter and the oxidation catalyst are arranged, and a microwave generator configured to generate a microwave to be irradiated onto the oxidation catalyst in a direction to which the exhaust gas flows.
    Type: Application
    Filed: March 29, 2018
    Publication date: October 4, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Publication number: 20180258809
    Abstract: An exhaust purification apparatus includes a microwave irradiation device; a fine particle collection filter that collects fine particles contained in an exhaust gas; and a controller. The microwave irradiation device includes: an annular microwave transmission line; a first microwave generator; a second microwave generator; and a microwave measurement circuit coupled at least one of to the annular microwave transmission line, between the annular microwave transmission line and the first microwave generator, or between the annular microwave transmission line and the second microwave generator.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Publication number: 20180258820
    Abstract: A microwave irradiation device includes a housing capable of accommodating an object to be heated; a plurality of microwave resonators installed around the housing; a microwave conductor coupling the plurality of microwave resonators; a microwave generator configured to generate microwaves having different frequencies; and a microwave measurement circuit coupled to the housing or the microwave conduction unit. Each of the microwave resonators resonates a microwave having a resonance frequency of the microwave resonator generated in the microwave generator and irradiates the object placed in the housing with the resonated microwave, and one microwave resonator among the plurality of microwave resonators and another microwave resonator have different resonance frequencies.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Publication number: 20180087421
    Abstract: A filter regeneration device includes a microwave radiator configured to radiate a microwave and disposed to be oriented in a direction toward a ceramic filter configured to purify exhaust gas of an internal combustion engine, the ceramic filter being disposed in a cylindrical portion of a metallic case having the cylindrical portion and having a protruding portion protruding toward an outside of the cylindrical portion of the metallic case, the microwave radiator being disposed inside the protruding portion, and a microwave generator configured to generate the microwave radiated from the microwave radiator toward the ceramic filter.
    Type: Application
    Filed: August 14, 2017
    Publication date: March 29, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Publication number: 20180073414
    Abstract: An exhaust purification device includes: an exhaust pipe configured to discharge exhaust gas from an internal combustion engine; a filter provided in the exhaust pipe and configured to collect a particulate matter contained in the exhaust gas; a plurality of electrodes configured to apply electric fields to a plurality of regions of the filter, respectively; and a power supply configured to apply at least two AC signals mutually different in phase to the plurality of electrodes.
    Type: Application
    Filed: November 14, 2017
    Publication date: March 15, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Tadahiro Imada
  • Publication number: 20180041177
    Abstract: A power amplifier includes a main amplifier, an auxiliary amplifier, and a control circuit. The main amplifier is configured to amplify input power, and the auxiliary amplifier is configured to amplify the input power when the input power exceeds a certain level. The control circuit, which is provided between a source of the main amplifier and a ground, is configured to control a source potential of the main amplifier so as to increase the source potential when the input power reaches at least a certain value.
    Type: Application
    Filed: July 12, 2017
    Publication date: February 8, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Masato Nishimori, Tatsuya Hirose, Ikuo Soga, Masayuki Hosoda, Tadahiro Imada
  • Publication number: 20180008925
    Abstract: A fine particle detector includes: a casing part configured to accommodate an object to be heated; an electromagnetic wave generating part configured to generate electromagnetic waves of different frequencies; at least one power sensor configured to measure powers, from the casing part, of the electromagnetic waves that have entered into the casing part; and a fine particle detection controlling part configured to determine, based on the powers of the electromagnetic waves of the different frequencies measured by the at least one power sensor, whether an accumulated amount of fine particles accumulated in the object to be heated is greater than or equal to a predetermined accumulated amount.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Tadahiro Imada, Katsusada Motoyoshi
  • Publication number: 20170292420
    Abstract: A disclosed microwave heating apparatus includes a casing part configured to accommodate an object to be heated; a microwave generator configured to generate a microwave; an electromagnetic wave generator configured to generate an electromagnetic wave whose frequency is different from that of the microwave; an electromagnetic wave sensor configured to measure power of the electromagnetic wave, the power of the electromagnetic wave being measured after the electromagnetic wave incident on the casing part from the electromagnetic wave generator has passed through the object to be heated; and a controller configured to control, based on the power measured in the electromagnetic wave sensor, the microwave generator to generate the microwave.
    Type: Application
    Filed: March 28, 2017
    Publication date: October 12, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Tadahiro Imada, Katsusada Motoyoshi, Tatsuya Hirose, Yoichi Kawano
  • Publication number: 20170204757
    Abstract: A microwave applicator includes a housing configured to contain an object of heating, multiple microwave resonators provided on and around a periphery of the housing, a microwave conductor interconnecting the microwave resonators, and a microwave generator configured to generate microwaves of different frequencies. Each microwave resonator is configured to resonate the generated microwaves of a resonant frequency of the microwave resonator, and to emit the resonated microwaves to the object of heating contained in the housing. Among the microwave resonators, a first microwave resonator and a second microwave resonator have respective resonant frequencies that are different from each other.
    Type: Application
    Filed: November 29, 2016
    Publication date: July 20, 2017
    Applicant: FUJITSU LIMITED
    Inventor: Tadahiro Imada