Patents by Inventor Takuji Maeda

Takuji Maeda 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: 20220308893
    Abstract: A slave device continuously transmits a plurality of tuning blocks to a host device at intervals defined by a clock period between a plurality of data blocks at the time of transmitting the plurality of data blocks and by a clock period defined by a data structure of the plurality of tuning blocks.
    Type: Application
    Filed: June 15, 2022
    Publication date: September 29, 2022
    Inventors: Tadashi ONO, Isao KATO, Takuji MAEDA
  • Publication number: 20220201424
    Abstract: A wireless control device is provided with: a first wireless control unit that acquires first information including information indicating first positions of persons by using a first wireless method; a second wireless control unit that connects to wireless devices by using a second wireless method, and acquires second information that includes device identification information for identifying the wireless devices and information indicating second positions of the wireless devices; and an information control unit that selects the first position within a prescribed range from each second position, and specifies person identification information linked with the device identification information of the second position as the person identification information of a person present at the selected first position.
    Type: Application
    Filed: April 15, 2020
    Publication date: June 23, 2022
    Inventors: Kunihiko SAKAIBARA, Takuji MAEDA, Nobuhiko ARASHIN, Kunio FURUTA, Jumpei SASAKI
  • Publication number: 20210240396
    Abstract: A storage device is connected to a host device. The storage device includes a non-volatile memory, a logical area manager that divides the non-volatile memory into a plurality of logical areas, an area information storage that stores information regarding the plurality of logical areas, an access pattern manager that manages access patterns that are designated by the host device and each correspond to a corresponding one of the plurality of logical areas, an access pattern storage that stores information regarding the access patterns, an access pattern processing manager that selects, when any one of the plurality of logical areas is accessed from the host device, an access pattern corresponding to the any one of the plurality of logical areas accessed from the information, and an access processing management and execution unit that performs processing on the non-volatile memory based on the access pattern and transfers data to the host device.
    Type: Application
    Filed: April 20, 2021
    Publication date: August 5, 2021
    Inventors: Shinji INOUE, Takuji MAEDA
  • Patent number: 11001281
    Abstract: A train communication system is configured to perform wireless communication between two cars coupled to each other by using low power radio. The train communication system includes: a first device disposed on one coupling surface of two coupling surfaces facing each other between two cars; a second device disposed on the one coupling surface; a third device disposed on another coupling surface of the two coupling surfaces; and a fourth device disposed on the other coupling surface. The first device and the third device are disposed to face each other. The second device and the fourth device are disposed to face each other. When no wireless connections are established among the first device, the second device, the third device, and the fourth device, the first to fourth devices each perform at least one of switching of communication channels used for wireless communication among the first to fourth devices and switching of a master device or a slave device.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: May 11, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takuji Maeda, Nobuhiko Arashin
  • Patent number: 10967890
    Abstract: A first antenna group includes one first antenna disposed at one end of a leading car, and another first antenna disposed at one end of a following car. A second antenna group includes one second antenna disposed at the one end of the leading car, the position where the one second antenna is disposed being different from the position where the one first antenna is disposed in a direction orthogonal to a travel direction of the leading car, and another second antenna disposed at the one end of the following car. A measurement unit measures radio wave strength between a pair of first antennas during communication via the first antenna group. A controller is enabled to make a switch from the first antenna group to the second antenna group when the radio wave strength is less than a predetermined value.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: April 6, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Nobuhiko Arashin, Takuji Maeda
  • Publication number: 20200201803
    Abstract: An information recording device stores data. The information recording device includes a first bus interface that transmits data to and receives data from an access device according to a first interface scheme, the access device accessing the information recording device, and a second bus interface that transmits data to and receives data from the access device according to a second interface scheme. The first bus interface and the second bus interface only share wiring of a power supply and wiring of a ground.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Inventors: Takuji MAEDA, Shuichi OHKI, Masayuki ORIHASHI, Osamu SHIBATA
  • Publication number: 20190354306
    Abstract: An available-capacity management method is a method for managing an available capacity of an information recording device including a nonvolatile memory configured to store file data, the method being performed by an access device configured to access the information recording device. This method includes: at time of mounting of the information recording device on the access device, retrieving, from the information recording device, available-capacity management information according to which available capacities of recording areas are managed; reconstructing the available-capacity management information based on a state of recording of data on the nonvolatile memory; updating the available-capacity management information in response to writing of data into the nonvolatile memory; and, at time of unmounting of the information recording device, recording the available-capacity management information on the information recording device.
    Type: Application
    Filed: August 2, 2019
    Publication date: November 21, 2019
    Inventor: Takuji MAEDA
  • Publication number: 20190333393
    Abstract: An inter-vehicle communication system is a system that provides communication between vehicles with use of a beam having a directivity and includes a first antenna and a second antenna. The first antenna is provided to a first vehicle, and performs wireless communication. The second antenna is provided to a second vehicle coupled to the first vehicle, and performs wireless communication. The second antenna emits a beam toward the first antenna. In a state where the first vehicle and the second vehicle are aligned to each other, a position in a horizontal direction of the first antenna is different from a position in the horizontal direction of the second antenna.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Inventors: Sotaro SHINKAI, Takuji MAEDA, Nobuhiko ARASHIN, Hiroshi OHUE
  • Patent number: 10448262
    Abstract: A communication system includes a transmission terminal and a reception terminal, and the transmission terminal transmits data to the reception terminal. The transmission terminal includes a storage unit that stores data and management information of the data, and a first communication unit that performs communication using a first radio method having non-directivity and a second radio method having directivity. The reception terminal includes a second communication unit that performs communication using the first radio method having non-directivity and the second radio method having directivity, and a selector that selects the data based on the management information. The first communication unit and the second communication unit communicate with each other using the first radio method having non-directivity when selecting the data to be transmitted, and communicates with each other using the second radio method having directivity when transmitting the selected data.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: October 15, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akira Yamasaki, Nobuhiko Arashin, Takuji Maeda
  • Publication number: 20190023294
    Abstract: A train communication system is configured to perform wireless communication between two cars coupled to each other by using low power radio. The train communication system includes: a first device disposed on one coupling surface of two coupling surfaces facing each other between two cars; a second device disposed on the one coupling surface; a third device disposed on another coupling surface of the two coupling surfaces; and a fourth device disposed on the other coupling surface. The first device and the third device are disposed to face each other. The second device and the fourth device are disposed to face each other. When no wireless connections are established among the first device, the second device, the third device, and the fourth device, the first to fourth devices each perform at least one of switching of communication channels used for wireless communication among the first to fourth devices and switching of a master device or a slave device.
    Type: Application
    Filed: September 25, 2018
    Publication date: January 24, 2019
    Inventors: Takuji MAEDA, Nobuhiko ARASHIN
  • Publication number: 20190023293
    Abstract: A first antenna group includes one first antenna disposed at one end of a leading car, and another first antenna disposed at one end of a following car. A second antenna group includes one second antenna disposed at the one end of the leading car, the position where the one second antenna is disposed being different from the position where the one first antenna is disposed in a direction orthogonal to a travel direction of the leading car, and another second antenna disposed at the one end of the following car. A measurement unit measures radio wave strength between a pair of first antennas during communication via the first antenna group. A controller is enabled to make a switch from the first antenna group to the second antenna group when the radio wave strength is less than a predetermined value.
    Type: Application
    Filed: September 24, 2018
    Publication date: January 24, 2019
    Inventors: Nobuhiko ARASHIN, Takuji MAEDA
  • Patent number: 10162833
    Abstract: The present disclosure provides a method of copying files at a high speed when accesses to both of a local memory physically connected to an access device and a remote memory connected via a wireless network. A file copy controller in the access device generates a FS transfer list in which logical address positions of copy sources and logical address positions of copy destinations are stored, based on file system management information of the local memory and an access list, obtained from another access device, of the remote memory, and inputs the FS transfer list to a non-volatile memory controller connected to the local memory. The non-volatile memory controller copies data between the local memory and the remote memory based on the information stored in the FS transfer list without using a CPU in the access device or an internal bus connected to the CPU.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: December 25, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masayuki Toyama, Takuji Maeda
  • Publication number: 20180109963
    Abstract: A communication system includes a transmission terminal and a reception terminal, and the transmission terminal transmits data to the reception terminal. The transmission terminal includes a storage unit that stores data and management information of the data, and a first communication unit that performs communication using a first radio method having non-directivity and a second radio method having directivity. The reception terminal includes a second communication unit that performs communication using the first radio method having non-directivity and the second radio method having directivity, and a selector that selects the data based on the management information. The first communication unit and the second communication unit communicate with each other using the first radio method having non-directivity when selecting the data to be transmitted, and communicates with each other using the second radio method having directivity when transmitting the selected data.
    Type: Application
    Filed: December 19, 2017
    Publication date: April 19, 2018
    Inventors: Akira YAMASAKI, Nobuhiko ARASHIN, Takuji MAEDA
  • Publication number: 20180107675
    Abstract: A communication system includes a recording medium and a recording device that writes file data into the recording medium. The recording medium includes a storage that stores configuration information as management information about a file system of the recording medium, and a configuration information updating unit that updates the configuration information. The recording device includes an updating instruction unit that transmits an updating instruction for updating the configuration information based on the file data, to the recording medium, an acquisition unit that acquires the configuration information after transmission of the updating instruction, and a writing unit that writes the file data into the storage based on the configuration information acquired by the acquisition unit.
    Type: Application
    Filed: December 18, 2017
    Publication date: April 19, 2018
    Inventors: Nobuhiko ARASHIN, Takuji MAEDA, Akira YAMASAKI
  • Patent number: 9921975
    Abstract: A cryptographic processing device comprises a cipher control circuit operative to execute at least one of encryption of plaintext data and decryption of ciphertext data on the basis of conversion parameter data; and a memory cell array that includes a plurality of memory cells, the plurality of memory cells including: a memory cell in a variable state, in which a resistance value reversibly changes between a plurality of changeable resistance value ranges in accordance with an electric signal applied thereto; and a memory cell in an initial state, which does not change to the variable state unless a forming stress for changing the memory cell in the initial state to the variable state is applied thereto, a resistance value of the memory cell in the initial state being within an initial resistance value range which does not overlap with the plurality of changeable resistance value ranges, wherein in the memory cell array, data including the conversion parameter data is stored on the basis of whether each of th
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: March 20, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoshikazu Katoh, Takuji Maeda, Shinji Inoue, Masato Suto
  • Patent number: 9811476
    Abstract: An encryption and recording apparatus storing data, the apparatus including: a first nonvolatile memory; a second nonvolatile memory; and an encryption and decryption control unit, wherein the encryption and decryption control unit: manages an area included in the second nonvolatile memory on a per-block basis, and manages association between a block and a block-unique key using key management information stored in the first nonvolatile memory; receives the data and corresponding information associated with the data; encrypts the data, using one or more block-unique keys associated with one or more blocks included in the second nonvolatile memory and writes the data to the one or more blocks; and stores the corresponding information into the key management information, associating the corresponding information and the one or more block-unique keys.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: November 7, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takuji Maeda, Shinji Inoue, Yoshikazu Katoh
  • Patent number: 9778857
    Abstract: A recording device operates in accordance with an instruction from an access device. The recording device comprising a nonvolatile memory that stores data, a communication unit that receives an instruction issued by the access device, and a memory controller that controls the nonvolatile memory. When a recording instruction for recording data into the nonvolatile memory is received from the access device, the memory controller starts recording of data into the nonvolatile memory. When the memory controller receives from the access device a suspension instruction for suspending the recording of data, the memory controller stores suspension information into the nonvolatile memory, the suspension information indicating a suspended position as a position in a recording area of the nonvolatile memory at which the data is being recorded upon reception of the suspension instruction.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: October 3, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd
    Inventors: Takuji Maeda, Masayuki Toyama, Hirokazu So
  • Patent number: 9762671
    Abstract: A file copy controller in a wireless access device reads file system management information of both of a local memory and a remote memory, generates a FS transfer list in which logical address positions of copy sources and logical address positions of copy destinations are stored, and inputs the FS transfer list to a non-volatile memory controller connected to the local memory. The non-volatile memory controller performs copy operation between the local memory and the remote memory based on the information stored in the FS transfer list without using a CPU in an access device or an internal bus connected to the CPU.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: September 12, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takuji Maeda, Masayuki Toyama
  • Patent number: 9515727
    Abstract: Methods and systems for in-band OSNR monitoring include a tunable optical filter to scan a passband of a desired optical channel. The optical power over the passband is measured and digitized to power waveform data. The power waveform data is processed with a digital signal processor to calculate OSNR. Additionally, various implementations accommodate dual polarization modulation formats using a parallel architecture and an alternating sequential architecture.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: December 6, 2016
    Assignee: Fujitsu Limited
    Inventors: Jeng-Yuan Yang, Youichi Akasaka, Motoyoshi Sekiya, Takuji Maeda, Hiroki Ooi, Satoru Okano
  • Patent number: 9515733
    Abstract: Methods and systems for mitigating spectral offset may use a scanning optical filter to scan different frequencies (or wavelengths) in a signal bandwidth of an optical channel. The maximum optical power value for the optical channel may be accurate determined as well as an effective wavelength corresponding to the maximum optical power value.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: December 6, 2016
    Assignee: Fujitsu Limited
    Inventors: Youichi Akasaka, Jeng-Yuan Yang, Motoyoshi Sekiya, Hiroki Ooi, Satoru Okano, Takuji Maeda