Patents by Inventor Yoshihiro Ohba

Yoshihiro Ohba 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: 11561737
    Abstract: According to one embodiment, an I/O command control apparatus receives authorization information. The authorization information indicates whether or not to permit an execution of an I/O command. The apparatus verifies whether the received authorization information is not tampered with, and whether the received authorization information is issued from a known authorization server. In a case where the authorization information is not tampered with, and is issued from the known server, the apparatus verifies whether or not the authorization information permits to execution of the I/O command. The apparatus permits or prohibits the execution of the I/O command or execution of a control command generated from the I/O command, based on the authorization result.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: January 24, 2023
    Assignee: Kioxia Corporation
    Inventors: Takeshi Ishihara, Yoshihiro Ohba, Atsushi Ohba
  • Publication number: 20230012102
    Abstract: According to one embodiment, an information processing apparatus comprises a calculator configured to calculate an encryption key and k key symbols, an encryption module configured to encrypt k information symbols to output k encrypted symbols, a selector configured to output the k encrypted symbols or the k key symbols as k message symbols, and to output a flag indicating which one of the k encrypted symbols and the k key symbols are output, an encoder configured to encode the k message symbols with a maximum distance separable code to output n code symbols, and an output module configured to output n code blocks from the n code symbols and the flag. k is a positive integer of one or more, and n is a positive integer larger than k.
    Type: Application
    Filed: December 13, 2021
    Publication date: January 12, 2023
    Inventor: Yoshihiro OHBA
  • Publication number: 20220292057
    Abstract: According to one embodiment, a storage device includes a storage and a controller. The storage stores a first table and a second table. The first table includes a set of a key and a value. The second table includes a set of the key and a member set that is a group of members requesting the value to be stored in the first table in association with the key. When receiving a delete command that requests the value associated with the key to be deleted in the first table, the controller deletes the member issuing the delete command in the member set stored in the second table, and deletes an entry corresponding to the key in the first table and an entry corresponding to the key in the second table when number of members in the member set becomes zero.
    Type: Application
    Filed: September 10, 2021
    Publication date: September 15, 2022
    Inventor: Yoshihiro OHBA
  • Publication number: 20220283742
    Abstract: According to one embodiment, an I/O command control apparatus receives authorization information. The authorization information indicates whether or not to permit an execution of an I/O command. The apparatus verifies whether the received authorization information is not tampered with, and whether the received authorization information is issued from a known authorization server. In a case where the authorization information is not tampered with, and is issued from the known server, the apparatus verifies whether or not the authorization information permits to execution of the I/O command. The apparatus permits or prohibits the execution of the I/O command or execution of a control command generated from the I/O command, based on the authorization result.
    Type: Application
    Filed: September 10, 2021
    Publication date: September 8, 2022
    Inventors: Takeshi Ishihara, Yoshihiro Ohba, Atsushi Ohba
  • Publication number: 20220107738
    Abstract: According to one embodiment, a read controller reads data and metadata from a nonvolatile memory. The read controller includes a reader, a read mode changer and a first data processor. The reader reads first data and first metadata from the nonvolatile memory. The read mode changer determines whether to execute sequential processing for the first data based on the first metadata. When the read mode changer determines that the sequential processing is to be executed, the first data processor stores information necessary for the sequential processing, executes the sequential processing for the first data, and generates second metadata including a result of the sequential processing. The read controller outputs the first data, and the first metadata or the second metadata.
    Type: Application
    Filed: June 15, 2021
    Publication date: April 7, 2022
    Inventors: Yoshihiro Ohba, Takeshi Ishihara, Takaya Ogawa, Hajime Matsui
  • Patent number: 10866832
    Abstract: A workflow scheduling system includes a first processor configured to schedule a plurality of workflows each including a plurality of tasks; a plurality of second processors configured to form a predetermined number of logical computation units and execute the scheduled workflows in parallel; and a memory that stores information about a plurality of task groups each of which includes one or more tasks from one or more of the workflows. The first processor is configured to, based on the stored information, instruct the second processors to execute the scheduled workflows while limiting a total number of the workflows simultaneously executed by the second processors to the predetermined number for each of the task groups.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: December 15, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Yoshihiro Ohba
  • Publication number: 20190213040
    Abstract: A workflow scheduling system includes a first processor configured to schedule a plurality of workflows each including a plurality of tasks; a plurality of second processors configured to form a predetermined number of logical computation units and execute the scheduled workflows in parallel; and a memory that stores information about a plurality of task groups each of which includes one or more tasks from one or more of the workflows. The first processor is configured to, based on the stored information, instruct the second processors to execute the scheduled workflows while limiting a total number of the workflows simultaneously executed by the second processors to the predetermined number for each of the task groups.
    Type: Application
    Filed: September 3, 2018
    Publication date: July 11, 2019
    Inventor: Yoshihiro OHBA
  • Publication number: 20180335951
    Abstract: An information processing apparatus including a processor configured to execute a process including receiving a first allocation request to allocate first data to any one of a plurality of disk storage devices, the first allocation request including a designation of an allocation unit for the first data, allocating the first data to a first disk storage device, receiving a second allocation request to allocate second data, the second allocation request including a designation of an allocation unit for the second data, and allocating the second data to the first disk storage device when the designation of the allocation unit for the second data is same as the designation of the allocation unit for the first data and allocating the second data to a second disk storage device when the allocation unit for the second data is different from the allocation unit for the first data.
    Type: Application
    Filed: May 9, 2018
    Publication date: November 22, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Yoshihiro Ohba
  • Patent number: 9831633
    Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: November 28, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshihiro Ishii, Satoru Sugawara, Yoshihiro Ohba, Kazuhiro Harasaka, Shunichi Sato, Kazuhiko Adachi
  • Patent number: 9678006
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: June 13, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Publication number: 20160377540
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Application
    Filed: September 9, 2016
    Publication date: December 29, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihiro OHBA, Satoru SUGAWARA, Toshihiro ISHll, Fumikazu HOSHI
  • Patent number: 9513216
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Patent number: 9513218
    Abstract: An optical sensor includes a light source to illuminate a linear polarization in a first direction, a first optical detector disposed on a path of a light illuminated from the light source and specularly reflected by an object, a first optical element to separate the light reflected by the object into a linear polarization in the first direction and a linear polarization in a second direction orthogonal to the first direction, a second optical detector to receive the linear polarization in the second direction separated by the first optical element, and a processor to obtain an amount of the light specularly reflected by the object on the basis of an output signal of the first optical detector and an output signal of the second optical detector.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Publication number: 20160149375
    Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 26, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Toshihiro ISHll, Satoru SUGAWARA, Yoshihiro OHBA, Kazuhiro HARASAKA, Shunichi SATO, Kazuhiko ADACHI
  • Publication number: 20160109364
    Abstract: In an optical senor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Application
    Filed: December 21, 2015
    Publication date: April 21, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihiro OHBA, Satoru SUGAWARA, Toshihiro ISHll, Fumikazu HOSHI
  • Patent number: 9274479
    Abstract: An optical sensor includes an irradiation system including a semiconductor laser having plural light-emitting parts; and at least one photodetector that detects an amount of light which is emitted from the irradiation system and reflected on a sheet-like object.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: March 1, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Fumikazu Hoshi, Yoshihiro Ohba
  • Patent number: 9276377
    Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: March 1, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshihiro Ishii, Satoru Sugawara, Yoshihiro Ohba, Kazuhiro Harasaka, Shunichi Sato, Kazuhiko Adachi
  • Patent number: 9267886
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: February 23, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Patent number: 9188530
    Abstract: A sensor is configured to include an optical sensor including a light source and a plurality of light receivers which receive light emitted from the light source and light regularly reflected and diffusely reflected by an object, a database including output data regarding multiple objects of known and different types from the plurality of light receivers when an incident direction of light emitted from the light source forms a first direction to the object and when the incident direction of light emitted from the light source forms a second direction which is orthogonal to the first direction, and a processor which controls the light emitted from the light source to illuminate an object of unknown type and specifies the type of the object by matching the output data of the plurality of light receivers to the database.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: November 17, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Fumikazu Hoshi, Satoru Sugawara, Toshihiro Ishii, Yoshihiro Ohba
  • Patent number: 8976216
    Abstract: A light source unit includes a surface-emitting laser array including light emitting units; and an apertured member provided on a light path of light beams emitted from the surface-emitting laser array, the apertured member including an aperture. In at least one direction, an intensity distribution of interference patterns caused by the light beams passing through the aperture includes an equal number of crests and troughs.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: March 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii