Patents by Inventor Takuma TAKEUCHI

Takuma TAKEUCHI 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: 20240303651
    Abstract: In an embodiment, a cryptographic token with usage limitations is issued, via a first issuer contract on a first distributed ledger, to a user account. The cryptographic token is transferred from the user account to a first mediation contract. A first transaction that is associated with a transfer of the cryptographic token from the first mediation contract to a second mediation contract on a second distributed ledger, is detected. A second transaction that is associated with a use of the cryptographic token on the second distributed ledger is detected. A request to the first issuer contract on the first distributed ledger is issued to determine whether the second transaction satisfies the usage limitations. A Verification result that indicates that the second transaction satisfies the usage limitations is received. A digital asset is transferred to a seller account on a third distributed ledger based on the received verification result.
    Type: Application
    Filed: March 10, 2023
    Publication date: September 12, 2024
    Applicant: Fujitsu Limited
    Inventors: Takuma TAKEUCHI, Shingo FUJIMOTO
  • Publication number: 20230114960
    Abstract: A control method executed by a computer, the control method includes acquiring, when receiving a request to determine an evaluation value of a target to be evaluated, a calculation formula of the evaluation value recorded in a ledger of a first blockchain network according to an input by a first user, and a first condition of a value of a variable included in the calculation formula recorded in a ledger of a second blockchain network according to an input by a second user; acquiring the evaluation value based on the acquired calculation formula of the evaluation value and a value selected from values that satisfy the acquired first condition; and controlling transmission of information that indicates that the selected value is the value of the variable to the second blockchain network.
    Type: Application
    Filed: December 14, 2022
    Publication date: April 13, 2023
    Applicant: FUJITSU LIMITED
    Inventors: Takuma TAKEUCHI, Masanobu MORINAGA
  • Patent number: 11496304
    Abstract: An information processing device includes a memory; and a processor coupled to the memory and configured to transmit, to a terminal, a program and a first identifier related to the program, the program being encrypted with a first public key corresponding to a first private key of the terminal, the first identifier being encrypted by using the first public key and a second public key not corresponding to the first private key; and when the terminal receives the first identifier decrypted by the first public key and encrypted by the second public key, register, in a blockchain, transaction information which includes the first identifier decrypted with the second private key corresponding to the second public key.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: November 8, 2022
    Assignee: FUJITSU LIMITED
    Inventors: Takuma Takeuchi, Ken Kamakura
  • Publication number: 20220271959
    Abstract: A transmission control method of a transaction stored in a block included in a blockchain in which a computer executes processing including, when receiving a reference request of the transaction, transmitting a verification request of the transaction to a node included in a blockchain network, and when receiving a verification result by the node, generating a verification block that stores the verification result, connecting the generated verification block to the blockchain, and controlling whether or not to transmit the transaction to a request source of the reference request on the basis of the verification result, and as a result, the transmission control method suppresses a processing load of the node included in the blockchain network.
    Type: Application
    Filed: May 3, 2022
    Publication date: August 25, 2022
    Applicant: FUJITSU LIMITED
    Inventors: Yuki Yonekura, Takuma Takeuchi
  • Publication number: 20220111736
    Abstract: A control device of an electrified vehicle controls a drive motor that drives a tire-wheel assembly of a vehicle based on a torque target value set based on a state of the vehicle. A control device includes a torque command value calculation unit that calculates a torque command value based on a torque target value using a function representing inverse characteristics of transmission characteristics that represent a relationship between torque of a drive motor and acceleration of a vehicle body and that change according to a speed of a vehicle, which is caused by elasticity of a carcass portion of a tire of a tire-wheel assembly and viscosity in a tread of the tire, and a motor controller that controls the drive motor to output torque corresponding to the torque command value.
    Type: Application
    Filed: September 27, 2021
    Publication date: April 14, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuma Takeuchi, Naoto Shimoya, Etsuo Katsuyama
  • Publication number: 20210234686
    Abstract: An information processing device includes a memory; and a processor coupled to the memory and configured to transmit, to a terminal, a program and a first identifier related to the program, the program being encrypted with a first public key corresponding to a first private key of the terminal, the first identifier being encrypted by using the first public key and a second public key not corresponding to the first private key; and when the terminal receives the first identifier decrypted by the first public key and encrypted by the second public key, register, in a blockchain, transaction information which includes the first identifier decrypted with the second private key corresponding to the second public key.
    Type: Application
    Filed: December 1, 2020
    Publication date: July 29, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Takuma Takeuchi, Ken Kamakura
  • Publication number: 20210224802
    Abstract: A method includes: obtaining a policy for a blockchain, the policy including plural logics configured to receive a respective input value and output a respective output value, any of the plural logics being configured to receive an output value from another logic; obtaining, for each logic in the policy, an input value and an output value from the blockchain; transmitting to a first node a first request including a first logic and the input and output values for the first logic, thereby causing the first node to verify the first logic using the input and output values for the first logic; and transmitting to a second node other than the first node a second request including a second logic and the input and output values for the second logic, thereby causing the second node to verify the second logic using the input and output values for the second logic.
    Type: Application
    Filed: January 5, 2021
    Publication date: July 22, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Takuma Takeuchi, Yuki Yonekura, Shingo Fujimoto, Masanobu Morinaga
  • Publication number: 20200250658
    Abstract: An information processing apparatus includes: a memory; and a processor coupled to the memory and configured to: acquire a price of a first transaction target in a history of transactions using a first virtual currency and a price of a second transaction target in a history of transactions using a second virtual currency; and calculate an exchange ratio between the first virtual currency and the second virtual currency based on the price of the first transaction target and the price of the second transaction target.
    Type: Application
    Filed: January 14, 2020
    Publication date: August 6, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Takuma Takeuchi, Shingo Fujimoto, Ken Kamakura
  • Publication number: 20200226596
    Abstract: An information processing apparatus includes: a memory; and a processor coupled to the memory and configured to: generate, in response to reception of a token issue request including transaction information from a user, a permission rule for determining a permission range of transaction contents based on the transaction information; transmit a token corresponding to the permission rule to a web application which processes a proxy transaction for the user, and determine, in response to reception of a signature issue request based on a transaction request by the user including the token from the web application, whether or not to issue a digital signature corresponding to the signature issue request, based on whether or not the transaction contents included in the transaction request are within the permission range determined by the permission rule corresponding to the token included in the signature issue request.
    Type: Application
    Filed: December 12, 2019
    Publication date: July 16, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Takuma Takeuchi, Yoshiki Higashikado, Shingo Fujimoto, Ken Kamakura
  • Patent number: 10073493
    Abstract: A device including circuitry that receives a first input from one or more touch sensors included in a display panel, and determines, based on the first input, whether a first touch operation is performed within a predetermined portion of the display panel. The circuitry controls, when it is determined that the first touch operation was performed within the predetermined portion, the display panel to display a screen pad and a pointer within an interface. The circuitry determines, based on a second input received from the one or more touch sensors, whether a second touch operation is performed within a portion of the display panel corresponding to the displayed screen pad. The circuitry controls, when the second touch operation is performed within the screen pad and based on features of the second touch operation, at least one of a movement of the pointer and an operation of the device.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: September 11, 2018
    Assignees: Sony Corporation, Sony Mobile Communications Inc.
    Inventor: Takuma Takeuchi
  • Publication number: 20150268743
    Abstract: A device including circuitry that receives a first input from one or more touch sensors included in a display panel, and determines, based on the first input, whether a first touch operation is performed within a predetermined portion of the display panel. The circuitry controls, when it is determined that the first touch operation was performed within the predetermined portion, the display panel to display a screen pad and a pointer within an interface. The circuitry determines, based on a second input received from the one or more touch sensors, whether a second touch operation is performed within a portion of the display panel corresponding to the displayed screen pad. The circuitry controls, when the second touch operation is performed within the screen pad and based on features of the second touch operation, at least one of a movement of the pointer and an operation of the device.
    Type: Application
    Filed: March 19, 2014
    Publication date: September 24, 2015
    Applicant: Sony Corporation
    Inventor: Takuma TAKEUCHI