Patents by Inventor Kenta Takahashi

Kenta Takahashi 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: 20200265390
    Abstract: In a first aspect of the present invention, a ticket displaying device includes a clock unit, a receiving unit, a generating unit, and a display unit. The clock unit indicates the date and time. The receiving unit receives key data. The generating unit generates first ticket image data for authenticating admission rights on the basis of the date and time indicated by the clock unit and key data. The display unit displays the first ticket image data. The first ticket image data displayed on the display unit changes over time based on the date and time indicated by the clock unit. The first ticket image data displayed on the display unit shows the same changes over time as second ticket image data which is displayed by another ticket displaying device for authenticating the same admission rights as the first ticket image data.
    Type: Application
    Filed: September 6, 2018
    Publication date: August 20, 2020
    Applicant: DWANGO Co., Ltd.
    Inventors: Nobuo KAWAKAMI, Kenta TAKAHASHI
  • Patent number: 10719593
    Abstract: This biometric signature system comprises: a biometric certificate storage module that stores a biometric certificate generated on the basis of a user's biometric information; a biometric information acquisition module that acquires new biometric information from the user; a biometric certificate generation module that generates a new biometric certificate on the basis of the new biometric information; a biometric signature generation module that assigns a biometric signature to the new biometric certificate on the basis of the new biometric information; a biometric signature verification module that verifies the biometric signature using the biometric certificate stored in the biometric certificate storage module; and a biometric certificate registration module that registers the new biometric certificate in the biometric certificate storage module if verification of the biometric signature was successful.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: July 21, 2020
    Assignee: HITACHI, LTD.
    Inventors: Yosuke Kaga, Masakazu Fujio, Kenta Takahashi
  • Patent number: 10680808
    Abstract: A biometric authentication system has a terminal which extracts and encodes feature data for authentication from acquired biometric information, and which transmits the encoded feature data for authentication. The system has a DB for storing encrypted authentication information, a search unit which searches for encrypted authentication information included in the DB, and a decryption unit which decrypts the encrypted authentication information searched for using encoded feature data for authentication as a decryption key. Accordingly, a user is uniquely identified using the obtained authentication information. Further, a processing unit performs authentication response processing with respect to the identified user, based on authentication information obtained by decryption.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: June 9, 2020
    Assignee: Hitachi, Ltd.
    Inventor: Kenta Takahashi
  • Patent number: 10611157
    Abstract: A wiping device includes a wiping member including a web to wipe an object to be wiped, and circuitry to cause the wiping member to perform a wiping operation to wipe the object to be wiped. The circuitry causes the wiping member to perform a first wiping operation to move the wiping member relative to the object to be wiped in a first direction to wipe the object to be wiped from a wiping start side of the first wiping operation, and perform a second wiping operation to relatively move the wiping member relative to the object to be wiped in a second direction different from the first direction, to wipe the object to be wiped from a wiping finish side different from the wiping start side of the first wiping operation with the wiping member.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: April 7, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukihiro Asano, Tatsuroh Watanabe, Daisuke Hasebe, Kenta Takahashi
  • Publication number: 20200079091
    Abstract: A roll device includes a feeding roll in which a web is wound, a winding roll configured to wind the web fed from the feeding roll, and a partition disposed between an outermost winding portion of the web fed from the feeding roll and an inner winding portion of the web overlapped with the outermost winding portion.
    Type: Application
    Filed: August 23, 2019
    Publication date: March 12, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenta Takahashi, Yukihiro Asano, Daisuke Hasebe, Tatsuroh Watanabe
  • Patent number: 10543689
    Abstract: A roll unit includes a feeding roller to which a belt-shaped member is wound, and a winding roller to which the belt-shaped member fed from the feeding roll is wound. One of the feeding roller and the winding roller is relatively movable to the other of the feeding roller and the winding roller.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: January 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Hasebe, Tatsuroh Watanabe, Yukihiro Asano, Kenta Takahashi
  • Publication number: 20200019685
    Abstract: A computer system comprising a computer, wherein the computer is configured to: generate feature data based on biometric information obtained from a user; generate error feature data indicating an error in the biometric information and stationary feature data indicating part other than the error in the biometric information, based on the feature data; generate a template based on the error feature data of the biometric information; generate first confidential information used for cryptographic process based on the stationary feature data of the biometric information, and generate first verification information based on the first confidential information.
    Type: Application
    Filed: January 25, 2018
    Publication date: January 16, 2020
    Inventor: Kenta TAKAHASHI
  • Publication number: 20200014540
    Abstract: A biometric signature system holds a first template indicating a result of transforming, by predetermined transformation, first biometric information acquired from a predetermined part of a user; and a second template indicating a result of transforming, by predetermined one-way transformation, second biometric information acquired from the predetermined part of the user, identifies a parameter for which a similarity between the first template of the person to be authenticated corrected, generates a second template of the person to be authenticated from each piece of corrected second biometric information, and determines whether authentication of the person to be authenticated is successful by comparing each generated second template with the second template.
    Type: Application
    Filed: February 14, 2018
    Publication date: January 9, 2020
    Inventors: Yosuke KAGA, Kenta TAKAHASHI, Masakazu FUJIO
  • Publication number: 20200003563
    Abstract: A self-localization estimation device includes: a map-information acquisition unit that acquires map information including lane information for specifying lanes in which vehicles are enabled to travel; a position calculation unit that calculates an own-vehicle absolute position being an absolute position of an own vehicle in response to navigation signals received from a plurality of navigation satellites, the position calculation unit including a self-location measurement unit, a vehicle-momentum measurement unit, and dead reckoning unit; and a position estimation unit that estimates, based on the map information and the own-vehicle absolute position, a corrected own-vehicle position being a corrected position of the own vehicle. The position estimation unit estimates the corrected own-vehicle position by superimposing a reliability of the map information and a reliability of the own-vehicle absolute position on each other.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Inventors: Kenji MIYAKE, Yuichi MINAMIGUCHI, Kenta TAKAHASHI, Minoru OKADA, Kazuyoshi ISAJI, Tatsumi SUGIYAMA
  • Publication number: 20200003567
    Abstract: A self-localization estimation unit of a self-localization estimation device determines, based on mutual relationships between the in-lane position and the absolute position including the error, whether there is lane-relevant candidate information, the lane-relevant candidate information representing that one or more in-vehicle positions are each estimated to be in which of lanes identified by the lane information; and estimates, based on a result of the determination of whether there is lane-relevant candidate information, a localization of the own vehicle corresponding to the map information.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Inventors: Yuichi MINAMIGUCHI, Kenji MIYAKE, Tatsumi SUGIYAMA, Kazuyoshi ISAJI, Minoru OKADA, Kenta TAKAHASHI
  • Patent number: 10404465
    Abstract: A sequential biometric cryptosystem includes: a registration terminal that extracts a set of feature data from each of multiple pieces of biological information acquired from each user, sequentially selects, out of these, a group of multiple sets of feature data, incrementing the number of combined sets, creates a protection template for each selected group of feature data, and stores the protection template into a storage apparatus. The sequential biometric cryptosystem also includes an authentication terminal that extracts feature data from a combination including one or more pieces of biological information of a specified user, acquired through a sensor on the user, verifies a combination of the extracted feature data against the protection template derived from the biological information having the same specified attribute, and performs, if the verification is successful, specified processing on the user.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: September 3, 2019
    Assignee: HITACHI, LTD.
    Inventor: Kenta Takahashi
  • Publication number: 20190255854
    Abstract: A wiping device includes a wiping member including a web to wipe an object to be wiped, and circuitry to cause the wiping member to perform a wiping operation to wipe the object to be wiped. The circuitry causes the wiping member to perform a first wiping operation to move the wiping member relative to the object to be wiped in a first direction to wipe the object to be wiped from a wiping start side of the first wiping operation, and perform a second wiping operation to relatively move the wiping member relative to the object to be wiped in a second direction different from the first direction, to wipe the object to be wiped from a wiping finish side different from the wiping start side of the first wiping operation with the wiping member.
    Type: Application
    Filed: January 15, 2019
    Publication date: August 22, 2019
    Inventors: Yukihiro ASANO, Tatsuroh WATANABE, Daisuke HASEBE, Kenta TAKAHASHI
  • Publication number: 20190238344
    Abstract: A database management method for controlling, by a computer including a processor, a memory, and a storage device, an in-memory database for storing all tables and indices in the memory and a disk type database for storing a part of a table stored in the storage device in a buffer included in the memory, in which the computer acquires information of the tables and the indices of the in-memory type database, determines the type of reduction operation for reducing an area on the memory used by the indices, executes the type of reduction operation determined for the indices, and adds, to the buffer, an area reduced from the area of the memory used by the indices of the in-memory type database by the reduction operation to expand the buffer of the disk type database.
    Type: Application
    Filed: July 21, 2016
    Publication date: August 1, 2019
    Applicant: HITACHI, LTD.
    Inventors: Yosuke KAGA, Kenta TAKAHASHI, Masakazu FUJIO, Ken NAGANUMA
  • Publication number: 20190184709
    Abstract: A roll unit includes a feeding roller to which a belt-shaped member is wound, and a winding roller to which the belt-shaped member fed from the feeding roll is wound. One of the feeding roller and the winding roller is relatively movable to the other of the feeding roller and the winding roller.
    Type: Application
    Filed: August 17, 2018
    Publication date: June 20, 2019
    Inventors: Daisuke HASEBE, Tatsuroh Watanabe, Yukihiro Asano, Kenta Takahashi
  • Publication number: 20190122478
    Abstract: A medium processing apparatus is a medium processing apparatus that executes a process for a medium, including: a first operation/display user interface that accepts a first operation pertaining to the process, and displays first information pertaining to a state of the medium processing apparatus; and a second operation/display user interface that accepts a second operation pertaining to the process, and displays second information pertaining to a state of the medium processing apparatus.
    Type: Application
    Filed: October 24, 2018
    Publication date: April 25, 2019
    Inventors: Aiko SANDA, Takayuki KURODA, Kenta TAKAHASHI
  • Publication number: 20190042716
    Abstract: This biometric signature system comprises: a biometric certificate storage module that stores a biometric certificate generated on the basis of a user's biometric information; a biometric information acquisition module that acquires new biometric information from the user; a biometric certificate generation module that generates a new biometric certificate on the basis of the new biometric information; a biometric signature generation module that assigns a biometric signature to the new biometric certificate on the basis of the new biometric information; a biometric signature verification module that verifies the biometric signature using the biometric certificate stored in the biometric certificate storage module; and a biometric certificate registration module that registers the new biometric certificate in the biometric certificate storage module if verification of the biometric signature was successful.
    Type: Application
    Filed: June 23, 2016
    Publication date: February 7, 2019
    Inventors: Yosuke KAGA, Masakazu FUJIO, Kenta TAKAHASHI
  • Publication number: 20180241558
    Abstract: A biometric authentication system has a terminal which extracts and encodes feature data for authentication from acquired biometric information, and which transmits the encoded feature data for authentication. The system has a DB for storing encrypted authentication information, a search unit which searches for encrypted authentication information included in the DB, and a decryption unit which decrypts the encrypted authentication information searched for using encoded feature data for authentication as a decryption key. Accordingly, a user is uniquely identified using the obtained authentication information. Further, a processing unit performs authentication response processing with respect to the identified user, based on authentication information obtained by decryption.
    Type: Application
    Filed: March 21, 2017
    Publication date: August 23, 2018
    Inventor: Kenta TAKAHASHI
  • Patent number: 10057068
    Abstract: A biometric signature system generates a digital signature for electronic documents using biometric information as a secret key. Registration commitment information is generated by performing expansion conversion on a predetermined secret key and embedding the resulting secret key in feature data of biometric information of a user, and a set with a corresponding public key. A pair of one-time secret and public keys is generated for digital signature feature data of the biometric information of the user, and a digital signature for a message is generated using the one-time secret key. A digital signature commitment is generated and a set of the one-time public key and the digital signature is output as the biometric digital signature. The digital signature is verified using the one-time public key. A differential secret key is calculated and a correspondence of the differential secret key, the one-time public key and the public key is verified.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: August 21, 2018
    Assignee: HITACHI, LTD.
    Inventor: Kenta Takahashi
  • Patent number: D871499
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: December 31, 2019
    Assignee: GLORY LTD.
    Inventors: Takayuki Kuroda, Aiko Sanda, Kenta Takahashi
  • Patent number: D879873
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: March 31, 2020
    Assignee: Glory Ltd.
    Inventors: Kenta Takahashi, Takayuki Kuroda