Patents by Inventor Tomoyuki Takada

Tomoyuki Takada 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: 20210243825
    Abstract: A communication apparatus functioning as an enrollee defined by a Device Provisioning Protocol (DPP) standard requests a communication parameter to be used by the communication apparatus to participate in a network formed by an access point from another communication apparatus functioning as a configurator defined by the DPP standard, receives the communication parameter from the other communication apparatus in response to the request, attempts to participate in the network using the communication parameter, and transmits an attempt result of the participation in the network to the other communication apparatus.
    Type: Application
    Filed: April 21, 2021
    Publication date: August 5, 2021
    Inventor: Tomoyuki Takada
  • Patent number: 11083045
    Abstract: A communication device is provided that transmits or receives a radio frame including a preamble and a data field of a physical layer (PHY). The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG (Extremely High Throughput Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG includes a subfield in which information is set on whether NOMA (Non-Orthogonal Multiple Access) is used in transmission of data included in the data field.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: August 3, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoyuki Takada
  • Patent number: 11019681
    Abstract: If a communication apparatus transmits data to another communication apparatus and communication via a communication unit included in another communication apparatus is not performable, whether or not to transmit a frame for causing a transition to a state where the communication via the communication unit included in the other communication apparatus is performable is selected based on priority of the data.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 25, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoyuki Takada
  • Publication number: 20200413482
    Abstract: A communication apparatus transmits or receives an Extremely High Throughput (EHT) single-user (SU) physical-layer protocol data unit (PPDU), an EHT extended range (ER) SU PPDU, or an EHT multi-user (MU) PPDU. The transmitted or received EHT PPDU includes an EHT signal field (EHT-SIG) which includes a field indicating information regarding semi-orthogonal multiple access (SOMA).
    Type: Application
    Filed: June 22, 2020
    Publication date: December 31, 2020
    Inventor: Tomoyuki Takada
  • Patent number: 10840899
    Abstract: A motor drive device includes an inverter circuit, a switching circuit that switches between conduction and interruption between a power supply and the inverter circuit, and a switching driver that outputs, to the switching circuit, a command voltage which commands a switching operation. The switching circuit includes a first field-effect transistor (FET) and a second FET connected in series with sources of each other in order from a side of the power supply, and the switching driver includes an output circuit that outputs an interruption command voltage in a case in which a potential difference between drains of the FETs exceeds a threshold value, and a delay circuit that causes a timing at which the command voltage is input to a gate of the first FET to be later than a timing at which the command voltage is input to a gate of the second FET.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: November 17, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Tomoyuki Takada
  • Publication number: 20200329526
    Abstract: A communication device that transmits or receives a radio frame including a preamble and a data field of a physical layer (PHY) is provided. The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG (Extremely High Throughput Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG includes a subfield in which information on whether NOMA (Non-Orthogonal Multiple Access) is used in transmission of data included in the data field is set.
    Type: Application
    Filed: March 26, 2020
    Publication date: October 15, 2020
    Inventor: Tomoyuki Takada
  • Publication number: 20200153747
    Abstract: If a communication apparatus is to transmit data to another communication apparatus and communication via a communication unit included in the other communication apparatus is not performable, whether or not to transmit a frame for causing a transition to a state where the communication via the communication unit included in the other communication apparatus is performable is selected based on an amount of data accumulated in a transmission queue in which the data is stored.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 14, 2020
    Inventor: Tomoyuki Takada
  • Publication number: 20200154517
    Abstract: If a communication apparatus transmits data to another communication apparatus and communication via a communication unit included in another communication apparatus is not performable, whether or not to transmit a frame for causing a transition to a state where the communication via the communication unit included in the other communication apparatus is performable is selected based on priority of the data.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 14, 2020
    Inventor: Tomoyuki Takada
  • Publication number: 20200083880
    Abstract: A motor drive device includes an inverter circuit, a switching circuit that switches between conduction and interruption between a power supply and the inverter circuit, and a switching driver that outputs, to the switching circuit, a command voltage which commands a switching operation. The switching circuit includes a first field-effect transistor (FET) and a second FET connected in series with sources of each other in order from a side of the power supply, and the switching driver includes an output circuit that outputs an interruption command voltage in a case in which a potential difference between drains of the FETs exceeds a threshold value, and a delay circuit that causes a timing at which the command voltage is input to a gate of the first FET to be later than a timing at which the command voltage is input to a gate of the second FET.
    Type: Application
    Filed: December 28, 2017
    Publication date: March 12, 2020
    Inventor: Tomoyuki TAKADA
  • Publication number: 20200079420
    Abstract: A motor includes a shaft to rotate about a central axis extending in a vertical direction, a metal heat sink including a through-hole through which the shaft extends, a substrate disposed at an upper side of the heat sink through a gap, a sensor magnet fixed to an upper end of the shaft, a rotation sensor located at an upper side of the sensor magnet, and a heat dissipating material located in a gap between the substrate and the heat sink. The heat sink includes a heat sink main body portion and a wall portion located between the substrate and the heat sink main body portion and between the heat dissipating material and the through-hole when viewed from the vertical direction.
    Type: Application
    Filed: December 22, 2017
    Publication date: March 12, 2020
    Inventor: Tomoyuki TAKADA
  • Publication number: 20190313549
    Abstract: A motor includes a shaft to rotate about a central axis extending in a vertical direction, a metal heat sink including a through-hole through which the shaft extends, a substrate disposed at an upper side of the heat sink through a gap, a sensor magnet fixed to an upper end of the shaft, a rotation sensor located at an upper side of the sensor magnet, and a heat dissipating material located in a gap between the substrate and the heat sink. On at least one of the substrate and the heat sink, a relief portion that retains the heat dissipating material is located between the heat dissipating material and the through-hole when viewed from the vertical direction and is open toward a gap between the substrate and the heat sink.
    Type: Application
    Filed: December 22, 2017
    Publication date: October 10, 2019
    Inventors: Kohei FUJITA, Tomoyuki TAKADA
  • Patent number: 9278454
    Abstract: A production apparatus ensures wireless communication without interference. An antenna portion 310 at a robotic arm includes a transmitting antenna portion 311 having a plurality of transmitting antennas 321 to 328 and a receiving antenna portion 312 having a plurality of receiving antennas 331 to 338. A transmitting side switcher circuit 361 changes over a transmitting antenna to be connected to a transmitter 351 among the plurality of transmitting antennas 321 to 328 in conjunction with an attitude information of the robotic arm, and changes an effective direction of a directional characteristic of the transmitting antenna portion 311. A receiving side switcher circuit 362 changes over a receiving antenna to be connected to a receiver 352 among the plurality of receiving antennas 331 to 338 in conjunction with the attitude information of the robotic arm and changes the effective direction of the directional characteristic of the receiving antenna portion 312.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: March 8, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshihiko Mimura, Keita Dan, Tadashi Eguchi, Tomoyuki Takada
  • Patent number: 9117658
    Abstract: There is provided a fabrication technique of a MOS structure that has a small EOT without increasing the interface trap density. More specifically, provided is a method of producing a semiconductor wafer that includes a semiconductor crystal layer, an interlayer made of an oxide, nitride, or oxynitride of a semiconductor crystal constituting the semiconductor crystal layer, and a first insulating layer made of an oxide and in which the semiconductor crystal layer, the interlayer, and the first insulating layer are arranged in the stated order. The method includes (a) forming the first insulating layer on an original semiconductor crystal layer, and (b) exposing a surface of the first insulating layer with a nitrogen plasma to nitride, oxidize, or oxynitride a part of the original semiconductor crystal layer, thereby forming the interlayer, together with the semiconductor crystal layer that is the rest of the original semiconductor crystal layer.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: August 25, 2015
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, THE UNIVERSITY OF TOKYO
    Inventors: Mitsuru Takenaka, Shinichi Takagi, Jaehoon Han, Tomoyuki Takada, Takenori Osada, Masahiko Hata
  • Publication number: 20150137317
    Abstract: A semiconductor wafer is provided. The semiconductor wafer comprises a sacrificial layer and a semiconductor crystal layer above a semiconductor crystal layer forming wafer, the semiconductor crystal layer forming wafer, the sacrificial layer and the semiconductor crystal layer being arranged in the order of the semiconductor crystal layer forming wafer, the sacrificial layer and the semiconductor crystal layer, wherein the semiconductor wafer comprises a diffusion inhibiting layer that inhibits diffusion of a first atom of one type selected from a plurality of types of atoms constituting the semiconductor crystal layer forming wafer or the sacrificial layer, at any cross-sectional position between (a) the interface of the semiconductor crystal layer forming wafer that faces the sacrificial layer and (b) a middle of the semiconductor crystal layer.
    Type: Application
    Filed: December 12, 2014
    Publication date: May 21, 2015
    Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takenori OSADA, Tomoyuki TAKADA, Masahiko HATA, Tetsuji YASUDA, Tatsuro MAEDA, Taro ITATANI
  • Publication number: 20150137318
    Abstract: A semiconductor wafer is provided. The semiconductor wafer comprises a sacrificial layer, a first semiconductor crystal layer, and a second semiconductor crystal layer above a semiconductor crystal layer forming wafer, wherein the semiconductor crystal layer forming wafer, the sacrificial layer, the first semiconductor crystal layer and the second semiconductor crystal layer are arranged in the order of the semiconductor crystal layer forming wafer, the sacrificial layer, the first semiconductor crystal layer and the second semiconductor crystal layer, a first atom of one type selected from a plurality of types of atoms constituting the semiconductor crystal layer forming wafer or the sacrificial layer is contained in the first semiconductor crystal layer and the second semiconductor crystal layer as an impurity, and the concentration of the first atom in the second semiconductor crystal layer is lower than the concentration of the first atom in the first semiconductor crystal layer.
    Type: Application
    Filed: December 12, 2014
    Publication date: May 21, 2015
    Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takenori OSADA, Tomoyuki TAKADA, Masahiko HATA, Tetsuji YASUDA, Tatsuro MAEDA, Taro ITATANI
  • Patent number: 8942261
    Abstract: A burst signal generator generates a burst signal that is a variable length portion whose length changes in accordance with fluctuations in data input at a predetermined period. An OFDM modulator generates an OFDM signal (including a guard interval portion and an effective symbol portion) that is a fixed length portion containing data corresponding to n (n is a positive integer) times or 1/n of the predetermined period. A frame includes the variable length portion and the fixed length portion. This makes a transmission signal actually have a frame period almost equal to the period of a signal synchronized with the clock of a player, including the fluctuations.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: January 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Takada, Noriyuki Suzuki, Makoto Umehara
  • Publication number: 20150012137
    Abstract: A production apparatus ensures wireless communication without interference. An antenna portion 310 at a robotic arm includes a transmitting antenna portion 311 having a plurality of transmitting antennas 321 to 328 and a receiving antenna portion 312 having a plurality of receiving antennas 331 to 338. A transmitting side switcher circuit 361 changes over a transmitting antenna to be connected to a transmitter 351 among the plurality of transmitting antennas 321 to 328 in conjunction with an attitude information of the robotic arm, and changes an effective direction of a directional characteristic of the transmitting antenna portion 311. A receiving side switcher circuit 362 changes over a receiving antenna to be connected to a receiver 352 among the plurality of receiving antennas 331 to 338 in conjunction with the attitude information of the robotic arm and changes the effective direction of the directional characteristic of the receiving antenna portion 312.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 8, 2015
    Inventors: Toshihiko Mimura, Keita Dan, Tadashi Eguchi, Tomoyuki Takada
  • Patent number: 8901605
    Abstract: There is provided a semiconductor wafer including a base wafer whose surface is entirely or partially a silicon crystal plane, an inhibitor positioned on the base wafer to inhibit crystal growth and having an opening that reaches the silicon crystal plane, a first crystal layer made of SixGe1-x (0?x<1) and positioned on the silicon crystal plane that is exposed in the opening, a second crystal layer positioned on the first crystal layer and made of a III-V Group compound semiconductor that has a band gap width larger than a band gap width of the first crystal layer, and a pair of metal layers positioned on the inhibitor and the second crystal layer. The pair of the metal layers are each in contact with the first crystal layer and the second crystal layer.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: December 2, 2014
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Tomoyuki Takada, Sadanori Yamanaka, Masao Shimada, Masahiko Hata, Taro Itatani, Hiroyuki Ishii, Eiji Kume
  • Patent number: 8878250
    Abstract: Electronic device is provided, including: a base wafer whose surface is made of silicon crystal; a Group 3-5 compound semiconductor crystal formed directly or indirectly on partial region of the silicon crystal; an electronic element including a portion of the Group 3-5 compound semiconductor crystal as active layer; an insulating film formed directly or indirectly on the base wafer and covering the electronic element; an electrode formed directly or indirectly on the insulating film; a first coupling wiring extending through the insulating film, having at least a portion thereof formed directly or indirectly on the insulating film, and electrically coupling the electronic element with the electrode; a passive element formed directly or indirectly on the insulating film; a second coupling wiring extending through the insulating film, having at least a portion thereof formed directly or indirectly on the insulating film, and electrically coupling the electronic element with the passive element.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: November 4, 2014
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masahiko Hata, Sadanori Yamanaka, Tomoyuki Takada, Kazuhiko Honjo
  • Patent number: 8837516
    Abstract: A communication apparatus performs communication of data using assigned time slots within a frame. In a case where data cannot be transmitted in a transmission time slot that has been assigned in order to transmit data, a time slot later than this transmission time slot is reserved as a time slot used to transmit the data, this later time slot being reserved within the frame having the transmission time slot in which the data cannot be transmitted.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Umehara, Naoto Takahashi, Tomoyuki Takada, Wataru Tachiwa, Hitoshi Asai