Patents by Inventor Kohei Okuda

Kohei Okuda 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: 11941247
    Abstract: According to one embodiment, a storage device includes a non-volatile memory and a control unit that is electrically connected to the non-volatile memory and that is configured to control the non-volatile memory. The control unit is configured to manage a plurality of management areas obtained by logically partitioning storage area of the non-volatile memory, when a write request is received that includes data for which a valid term has been set, determine, based on the valid term, a first management area from among the management areas, write the data included in the write request to the determined first management area, and when the data written to the first management area is erased, collectively erase all data written in the first management area which includes the data.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: March 26, 2024
    Assignee: Kioxia Corporation
    Inventors: Takeshi Ishihara, Yohei Hasegawa, Shinichi Kanno, Kohei Okuda, Masataka Goto
  • Publication number: 20230385462
    Abstract: A memory system includes a first controller, a nonvolatile memory connected to the first controller, and a power supply circuit that applies a voltage to the first controller and the nonvolatile memory. The first controller writes first data to a first address in the nonvolatile memory and instructs the power supply circuit to apply the destruction voltage to the nonvolatile memory. The first controller determines whether the first data can be correctly read from the first address in the nonvolatile memory and checks destruction of the nonvolatile memory based on the determination.
    Type: Application
    Filed: February 13, 2023
    Publication date: November 30, 2023
    Applicant: Kioxia Corporation
    Inventors: Kohei OKUDA, Hayato FUJIWARA, Tatsuya HOSOKAWA, Hiroyasu NAKATSUKA, Ge WANG
  • Patent number: 11809330
    Abstract: An information processing apparatus includes a network interface, a storage device, and a processor. The processor is configured to assign a plurality of zones in the storage device. Each of the zones is a contiguous physical address range of the storage device that is mapped to a contiguous logical address range. The processor is configured to generate zone management information for each of the plurality of zones, store content received from the origin server via the network interface, in one of writable zones and update a writable address of the zone management information for the one of the writable zones. The processor is configured to operate to transmit the received content, and control the storage device to delete data stored therein in units of a zone upon a predetermined cache clearing criteria being met.
    Type: Grant
    Filed: March 3, 2022
    Date of Patent: November 7, 2023
    Assignee: Kioxia Corporation
    Inventors: Masataka Goto, Kohei Okuda, Takahiro Kurita
  • Publication number: 20220398201
    Abstract: An information processing apparatus includes a network interface, a storage device, and a processor. The processor is configured to assign a plurality of zones in the storage device. Each of the zones is a contiguous physical address range of the storage device that is mapped to a contiguous logical address range. The processor is configured to generate zone management information for each of the plurality of zones, store content received from the origin server via the network interface, in one of writable zones and update a writable address of the zone management information for the one of the writable zones. The processor is configured to operate to transmit the received content, and control the storage device to delete data stored therein in units of a zone upon a predetermined cache clearing criteria being met.
    Type: Application
    Filed: March 3, 2022
    Publication date: December 15, 2022
    Inventors: Masataka GOTO, Kohei OKUDA, Takahiro KURITA
  • Publication number: 20210278972
    Abstract: According to one embodiment, a storage device includes a non-volatile memory and a control unit that is electrically connected to the non-volatile memory and that is configured to control the non-volatile memory. The control unit is configured to manage a plurality of management areas obtained by logically partitioning storage area of the non-volatile memory, when a write request is received that includes data for which a valid term has been set, determine, based on the valid term, a first management area from among the management areas, write the data included in the write request to the determined first management area, and when the data written to the first management area is erased, collectively erase all data written in the first management area which includes the data.
    Type: Application
    Filed: December 11, 2020
    Publication date: September 9, 2021
    Applicant: Kioxia Corporation
    Inventors: Takeshi ISHIHARA, Yohei HASEGAWA, Shinichi KANNO, Kohei OKUDA, Masataka GOTO
  • Patent number: 8842337
    Abstract: A printing apparatus, which performs printing using a cyan ink, a magenta ink, a yellow ink, and two kinds of black inks, includes an image data acquisition section configured to acquire image data representing an image targeted for printing; a black line specification section configured to specify a black line included in the image on the basis of the image data; a printing control section configured to perform control so as to, along with performing printing of the black line by using the two kinds of black inks, perform printing with respect to pixels forming at least one portion of the black line so as to overlap the two kinds of black colors, and perform printing of a portion other than the black line by using at least one of the cyan ink, the magenta ink, the yellow ink, and the two kinds of black inks.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: September 23, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Kohei Okuda
  • Patent number: 8665494
    Abstract: Based on an input profile which regulates a corresponding relationship between an input gradation value of a device-dependent color space depending on a first printing apparatus and a gradation value of a device-independent color space, and an output profile which regulates a corresponding relationship between a gradation value of a device-independent color space and an input gradation value of a device-independent color space depending on a second printing apparatus, the colors of each pixel of a case, where the gradation values of each pixel shown by reference image data are input gradation values of the device-dependent color space depending on the first printing apparatus, are specified by the input gradation value of the device-dependent color space depending on the second printing apparatus, and the output gradation value is specified by converting the specified input gradation value based on the color conversion table of the second printing apparatus.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: March 4, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Kohei Okuda
  • Publication number: 20120229824
    Abstract: Based on an input profile which regulates a corresponding relationship between an input gradation value of a device-dependent color space depending on a first printing apparatus and a gradation value of a device-independent color space, and an output profile which regulates a corresponding relationship between a gradation value of a device-independent color space and an input gradation value of a device-independent color space depending on a second printing apparatus, the colors of each pixel of a case, where the gradation values of each pixel shown by reference image data are input gradation values of the device-dependent color space depending on the first printing apparatus, are specified by the input gradation value of the device-dependent color space depending on the second printing apparatus, and the output gradation value is specified by converting the specified input gradation value based on the color conversion table of the second printing apparatus.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 13, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Kohei Okuda
  • Publication number: 20120229861
    Abstract: A printing apparatus, which performs printing using a cyan ink, a magenta ink, a yellow ink, and two kinds of black inks, includes an image data acquisition section configured to acquire image data representing an image targeted for printing; a black line specification section configured to specify a black line included in the image on the basis of the image data; a printing control section configured to perform control so as to, along with performing printing of the black line by using the two kinds of black inks, perform printing with respect to pixels forming at least one portion of the black line so as to overlap the two kinds of black colors, and perform printing of a portion other than the black line by using at least one of the cyan ink, the magenta ink, the yellow ink, and the two kinds of black inks.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 13, 2012
    Applicant: Seiko Epson Corporation
    Inventor: Kohei Okuda