Patents by Inventor Tomohiro Kawaguchi

Tomohiro Kawaguchi 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: 11506622
    Abstract: A gas detector includes metal-oxide semiconductor gas sensors and their driving circuit. The gas detector stores the ratio of initial gas sensor resistance in air and that in an atmosphere including Freon gas, for the gas sensors. The gas detector learns sensor resistance in air for a gas sensor in use and detects Freon gas by comparing the sensor resistance of the gas sensor in use with the learned resistance in air divided by the ratio. When the first gas sensor has been used for a predetermined period, both the first gas sensor and a second gas sensor are used for a learning period to continue detection of Freon by the first gas sensor and to learn the resistance in air of the second gas sensor. After completion of the learning period, Freon is detected by the second gas sensor.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: November 22, 2022
    Assignee: FIGARO ENGINEERING INC.
    Inventors: Masafumi Toyota, Kunihiko Maejima, Tomohiro Kawaguchi, Tatsuya Ishimoto
  • Patent number: 11467513
    Abstract: An image forming apparatus includes an image carrier, a charger, an exposure device, a development device and a pressing mechanism. The developer carrier is pressed on the image carrier with a predetermined pressing force to form a nip area between the roller part and the image carrier. A roller part of the developer carrier has an Asker C hardness of 65° or more and 73° or less. When the pressing force is set to X (N) and a width of the nip area in a circumferential direction of the image carrier is set to Y (?m), 3.0?X?8.0 and 550?Y?700, and the following expressions (1) and (2) are satisfied, Y ? 31. X + 393.2 ? and , ( 1 ) Y ? 47. X + 450.1 .
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: October 11, 2022
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomohiro Tamaki, Takahisa Nakaue, Kotatsu Kawaguchi, Masahito Ishino, Yukari Ota
  • Publication number: 20220291874
    Abstract: Example implementations described herein involve systems and methods which can include managing a mapping between write identifier, access virtual device identifier, and physical device for a drive unit comprising a plurality of physical devices. for migration of a virtual device from a first controller to a second controller, example implementations can further involve retrieving a virtual device identifier from the second controller; determining the physical device associated with the virtual device from the plurality of physical devices; and updating, for the determined physical device, the access virtual device identifier with the virtual device identifier in the mapping. Commands received to the determined physical device are processed through modification of one or more fields related to a data integrity field of the commands based on the updated mapping. Data received from the determined physical device is processed through modification of the data integrity field based on the updated mapping.
    Type: Application
    Filed: March 15, 2021
    Publication date: September 15, 2022
    Inventors: Naruki KURATA, Tomohiro KAWAGUCHI
  • Patent number: 11426425
    Abstract: The present invention has an objective of providing a novel composition for treating a fibrocartilaginous tissue injury. The present invention provides a composition for treating a fibrocartilaginous tissue injury, which is to be applied to an injured fibrocartilaginous tissue part of a target and which comprises a monovalent metal salt of alginic acid, more preferably a low endotoxin monovalent metal salt of alginic acid.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: August 30, 2022
    Assignees: Mochida Pharmaceutical Co., Ltd., National University Corporation Hokkaido University
    Inventors: Eiji Kondo, Norimasa Iwasaki, Tomohiro Onodera, Wooyoung Kim, Yasuyuki Kawaguchi
  • Publication number: 20220269413
    Abstract: Example implementations described herein are directed to systems and methods for facilitating remote copy pair volume with data consistency. For a command received for one of a first volume and a second volume during execution of a pair synchronization process between the first volume and the second volume, example implementations can involve determining whether an address range of one of the first volume and the second volume configured to be provided to a host computer is to be locked based on the command; locking the address range of the one of the first volume and the second volume for the determination indicative of the address range of one of the first volume and the second volume is to be locked; and executing the command on the first volume and the second volume while the address range configured to be provided to the host computer is locked.
    Type: Application
    Filed: February 25, 2021
    Publication date: August 25, 2022
    Inventor: Tomohiro KAWAGUCHI
  • Publication number: 20220263839
    Abstract: A computer system comprises an analysis module configured to execute dynamic analysis for a sample of a malicious program, and to output an analysis result including a coupling destination to and from which the malicious program communicates; a variation detection module configured to detect variation of the coupling destination based on results of cyclic observation of the coupling destination, and to output a result of the detection; and an information sharing module configured to store information output from the analysis module and information output from the variation detection module in a form that allows sharing among a plurality of external computers.
    Type: Application
    Filed: March 5, 2020
    Publication date: August 18, 2022
    Inventors: Shota FUJII, Masato TERADA, Takayuki SATOU, Sho AOKI, Tomohiro SHIGEMOTO, Nobutaka KAWAGUCHI, Yu TSUDA, Nobuyuki KANAYA, Shingo YASUDA, Daisuke INOUE
  • Patent number: 11416160
    Abstract: Example implementations described herein are directed to systems and methods for facilitating remote copy pair volume with data consistency. For a command received for one of a first volume and a second volume during execution of a pair synchronization process between the first volume and the second volume, example implementations can involve determining whether an address range of one of the first volume and the second volume configured to be provided to a host computer is to be locked based on the command; locking the address range of the one of the first volume and the second volume for the determination indicative of the address range of one of the first volume and the second volume is to be locked; and executing the command on the first volume and the second volume while the address range configured to be provided to the host computer is locked.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: August 16, 2022
    Assignee: HITACHI, LTD.
    Inventor: Tomohiro Kawaguchi
  • Publication number: 20220236879
    Abstract: Example implementation described herein are directed to a mechanism to provision data volume which requires remote data copy between separated clusters, especially for the container platform. For a request to create a volume made to the clusters, example implementations can involve creating a first volume in a first cluster; obtaining volume information of a corresponding second volume from a second cluster; configuring the first volume and the corresponding second volume in the second cluster to have a remote copy relationship based on the obtained volume information; and setting access from the container to the first volume and the corresponding second volume based on the remote copy relationship.
    Type: Application
    Filed: January 27, 2021
    Publication date: July 28, 2022
    Inventors: Akiyoshi TSUCHIYA, Tomohiro KAWAGUCHI
  • Patent number: 11392307
    Abstract: Example implementations described herein facilitate a drive unit to share physical mediums (e.g. solid state drives) among multiple storage controllers or storage nodes in a distributed storage system, while keeping them physically independent in a redundancy group to avoid single point of failure, by providing an interface to notify redundancy group to the drive unit.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: July 19, 2022
    Assignee: HITACHI, LTD.
    Inventors: Naruki Kurata, Tomohiro Kawaguchi
  • Patent number: 11379319
    Abstract: A storage system is connected to a backup storage system over a Storage Area Network (SAN). The backup storage system is managed by a backup server. The storage system includes a primary volume, a secondary volume configured to be mounted to a backup volume in the backup storage system and configured to be paired with the primary volume, and a processor configured to, for receipt of a backup operation request from the backup server, copy the primary volume to the secondary volume through a pair operation based on an Input/Output (I/O) between the storage system and a host computer managing the storage system, mount the secondary volume to the backup volume, and based on the I/O, copy the secondary volume to the backup volume through the SAN.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: July 5, 2022
    Assignee: HITACHI, LTD.
    Inventors: Yoshihiro Yoshii, Tomohiro Kawaguchi
  • Patent number: 11377685
    Abstract: A base sequence determination apparatus includes (1) a mobility correction unit that outputs a mobility correction signal obtained by mobility correction of a time-series signal of a wavelength spectrum corresponding to each base, (2) a deconvolution unit that executes processes for calculating a deconvoluted signal of the mobility correction signal respectively for a plurality of parameter candidates of point spread function, calculating variance of peak intervals for the calculated deconvoluted signal, specifying a parameter of the point spread function using the calculated variance, and outputting the deconvoluted signal corresponding to the point spread function having the specified parameter as an updated deconvoluted signal, (3) a peak extracting unit that extracts a peak waveform from the updated deconvoluted signal and outputs an updated peak-extracted signal, and (4) a sequence specifying unit that inputs the updated peak-extracted signal and determines a base sequence.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: July 5, 2022
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Yohei Kawaguchi, Tomohiro Yasuda, George Chalkidis, Takahide Yokoi
  • Patent number: 11340820
    Abstract: A storage-based migration is performed in a VVOL environment. A migration processing unit generates a migration group in which a virtual volume to be migrated, a protocol endpoint related to the virtual volume, and a storage container that cuts out the virtual volume are grouped, and migrates the migration group to a storage node; and a configuration changing unit configures, based on information of the migration group transmitted from the storage node, a protocol endpoint, a virtual volume, and a storage container on a storage node which are the same as the protocol endpoint, the virtual volume, and the storage container configured on the storage node.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: May 24, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Takanobu Suzuki, Tomohiro Kawaguchi, Tsukasa Shibayama
  • Patent number: 11321196
    Abstract: Example implementations described herein are directed to backup and restore of a public cloud and data center for disaster recovery. In a backup process of the disaster recovery, the VM root device information (a public cloud) and storage system volume information (a data center) in a main site are transferred to the disaster recovery tool. In a restoration process, the DR Tool specifies the storage system volume for backup to attach the VM in a backup site with the above information.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: May 3, 2022
    Assignee: HITACHI, LTD.
    Inventors: Miho Kobayashi, Tomohiro Kawaguchi, Akiyoshi Tsuchiya
  • Patent number: 11307789
    Abstract: A storage system and storage control method are provided in which a plurality of volumes to be processed by a storage control unit are distributed and evacuated in a normal storage control unit without recovering redundancy of the storage control unit having decreased redundancy, and the storage control unit itself having the decreased redundancy is deleted after the evacuating is completed, and thus reservation information processing resources for guaranteeing recoverability of the redundancy become unnecessary.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: April 19, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Kenta Sato, Akira Deguchi, Tomohiro Kawaguchi
  • Patent number: 11307944
    Abstract: Example implementations described herein are directed to automated failover and assuring RTO (Recovery Time Objective) assurance, and RPO (Recovery Point Objective) on asynchronous remote copy feature of storage. By using markers that are cyclically stored to the journal volume, the storage device can thereby determine an accurate communication loss period.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: April 19, 2022
    Assignee: Hitachi, Ltd.
    Inventor: Tomohiro Kawaguchi
  • Patent number: 11294578
    Abstract: With omission of a duplication process of compressed data, a cache access frequency is reduced to improve throughput. A storage system includes first and second control units and a storage drive. Upon receiving a data write command, the first control unit stores data to be subjected to the write command in a first cache area of the first control unit, and stores the data in a second cache area of the second control unit to perform duplication, and upon completion of the duplication, the first control unit transmits a response indicating an end of write, performs a predetermined process on the data to be subjected to the write command, stores the data in a buffer area, reads the data stored in the buffer area, and transmits the read data to the storage drive.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: April 5, 2022
    Assignee: HITACHI, LTD.
    Inventors: Kazuki Matsugami, Yoshihiro Yoshii, Nobumitsu Takaoka, Tomohiro Kawaguchi
  • Publication number: 20220100387
    Abstract: Saving a capacity of an on-premises storage apparatus, a high access performance of the on-premises storage apparatus, and resuming an operation quickly and accurately by using data on a cloud when a resource in the on-premises fails are achieved. A processor provides a first volume which is a virtual volume, and configures a copy pair of the first volume and a second volume provided from another storage system. Write data to the first volume is transferred to the second volume via a network, based on the copy pair. The processor writes to the memory a part of data written to the second volume, and writes to the storage device the data written to the memory.
    Type: Application
    Filed: December 9, 2021
    Publication date: March 31, 2022
    Inventors: Akira DEGUCHI, Tomohiro KAWAGUCHI
  • Patent number: 11288006
    Abstract: In a storage system having a controller constructing a provision volume provided to a server system and an addition volume in which data to be stored in the provision volume is added and stored, when a provision volume copying instruction is received, the controller inserts a start marker indicating start time point of copying into address change history information and copies address conversion information of a provision volume while receiving update data to a provision volume from the server system, as address conversion information of a copy-destination volume. On the basis of a start marker of address change history information and history information, a change from start to completion of copying of the address conversion information of a copy-destination volume is reset to a state at the start time point of copying.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: March 29, 2022
    Assignee: HITACHI, LTD.
    Inventors: Yusuke Yamaga, Tomohiro Kawaguchi, Akira Deguchi, Takaki Matsushita, Tadato Nishina
  • Patent number: 11275511
    Abstract: The accuracy of predicting the remaining life of a non-volatile memory in which WA occurs is enhanced. A storage controller predicts the remaining lives of SSDs on the basis of the data storage rates of the respective SSDs. When the storage controller determines that a life expectation result on one SSD does not satisfy a target operation period while a life expectation result on another SSD satisfies the target operation period, the storage controller executes extent migration processing of migrating data in any data stored extent to an extent in which data has not been stored, thereby decreasing the data storage rate of the one SSD to extend the life of the one SSD.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: March 15, 2022
    Assignee: HITACHI, LTD.
    Inventors: Hideyuki Koseki, Tomohiro Kawaguchi
  • Patent number: 11269550
    Abstract: A storage system includes a storage controller, plural volumes each configured by the storage controller, and a pool allocating physical storage areas to logical storage areas of the volumes. The storage controller configures a first group including, among the volumes, a first primary volume to which a first target protection period is set, and a first history information volume storing history information about updating to the first primary volume, and a second group including, thereamong, a second primary volume to which a second target protection period is set, and a second history information volume storing history information about updating to the second primary volume. The volumes included in the first and second groups utilize the same physical storage area of the pool. When increasing a free capacity thereof, history information to be purged is determined from the first and second protectable periods such that their protectable periods become the same.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: March 8, 2022
    Assignee: HITACHI, LTD.
    Inventors: Ai Satoyama, Tomohiro Kawaguchi, Takaki Matsushita