Patents by Inventor Yoshihiro Fujii

Yoshihiro Fujii 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: 10600707
    Abstract: A fiber-containing resin substrate includes a thermosetting epoxy resin-impregnated fiber base material, and an uncured resin layer formed on one side thereof formed from a composition containing: (A) a crystalline bisphenol A type epoxy resin and/or a crystalline bisphenol F type epoxy resin, (B) an epoxy resin that is non-fluid at 25° C. other than the component (A), (C) a phenol compound having two or more phenolic hydroxy groups in one molecule, (D) an inorganic filler, and (E) an urea-based curing accelerator. The fiber-containing resin substrate collectively encapsulates a semiconductor devices mounting surface or a semiconductor devices forming surface on a wafer level, even when a large-diameter wafer or a large-diameter substrate is encapsulated, to reduce warpage of the substrate or the wafer and peeling of a semiconductor device from the substrate, and to have the uncured resin layer excellent in storage stability and handleability before curing.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: March 24, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yoshihiro Tsutsumi, Shuichi Fujii, Kenji Hagiwara, Shinsuke Yamaguchi
  • Patent number: 10557018
    Abstract: Provided is a three-dimensional object producing method, including: a first step of forming a film by delivering a first liquid as a hydrogel precursor including at least a multifunctional monomer; and a second step of curing the film formed in the first step, wherein the first step and the second step are repeated a plurality of times.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: February 11, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Norikane, Ichiroh Fujii, Hiroshi Iwata
  • Publication number: 20190328365
    Abstract: An ultrasound diagnosis apparatus according to an embodiment includes processing circuitry configured: to obtain information about a degree of deterioration of each ultrasound probe; and to display pieces of identification information of a plurality of ultrasound probes in a ranking order according to the information.
    Type: Application
    Filed: April 25, 2019
    Publication date: October 31, 2019
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Koji KUROIWA, Eiji Goto, Yoshihiro Oomori, Tomokazu FUJII
  • Patent number: 10435783
    Abstract: A target assembly is provided in which an abnormal discharging between a projected portion of a backing plate and a side surface of the target is prevented and also in which a bonding material to bond the target and the backing plate can be surely prevented from seeping to the outside and also which is easy in reusing the backing plate. The target assembly according to this invention having: a target made of an insulating material; and a backing plate bonded to one surface of the target via a bonding material, the backing plate having a projected portion which is projected outward beyond an outer peripheral edge of the target, further has an annular insulating plate. The annular insulating plate: encloses a circumference of the target while maintaining a predetermined clearance to a side surface of the target; and covers that surface of the projected portion.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: October 8, 2019
    Assignee: ULVAC, INC.
    Inventors: Shinya Nakamura, Yoshihiro Ikeda, Yuusuke Miyaguchi, Kazuyoshi Hashimoto, Kengo Tsutsumi, Yoshinori Fujii
  • Patent number: 10313119
    Abstract: A data management device according to an embodiment stores first encrypted data obtained by encrypting plain text data with a first public key of a first user device. The data management device stores a first re-encryption key for re-encrypting the first encrypted data without decrypting to obtain first re-encrypted data decryptable with a private key of a second user device. The data management device stores a conversion key generated from a first private key corresponding to the first public key and a second private key of the first user device. The data management device converts the first encrypted data into second encrypted data with the conversion key. The data management device The data management device converts the first re-encryption key into a second re-encryption key with the conversion key.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: June 4, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Masanobu Koike, Yoshihiro Fujii
  • Patent number: 9962760
    Abstract: A titanium slab is appropriate for hot rolling, is produced by electron beam melting furnace, has superior linearity so that it can be fed into a hot rolling machine without performing breaking down process or other subsequent correcting process after production, and has good structure having no cracks at the corner parts. A process for production thereof is also provided. The titanium slab is directly produced by a mold of an electron beam melting furnace, and has the deformation of not more than 5 mm for the thickness direction versus the longitudinal direction and deformation of not more than 2.5 mm for the width direction versus the longitudinal direction, both per a length of 1000 mm of the slab. The process for production of this titanium slab for hot rolling has a step of using an electron beam melting furnace in which its rectangular mold has mold walls of a long side and mold walls of a short side, and a step of pouring molten metal from one of the mold walls of a short side.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: May 8, 2018
    Assignees: TOHO TITANIUM CO., LTD., NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hisamune Tanaka, Norio Yamamoto, Takeshi Shiraki, Takashi Oda, Yoshimasa Miyazaki, Yoshihiro Fujii, Kazuhiro Takahashi
  • Patent number: 9819487
    Abstract: A re-encryption key generator according to an embodiment generates a re-encryption key to obtain re-encrypted data that can be decrypted by a second private key of a second user device by re-encrypting ciphertext obtained by encrypting plaintext by a first public key of a first user device without decryption. The re-encryption key generator stores a first private key corresponding to the first public key. The re-encryption key generator stores a second re-encryption key generation key of the second user device that is different from a second public key corresponding to the second private key. The re-encryption key generator generates the re-encryption key based on the first private key and the second re-encryption key generation key.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: November 14, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yoshihiro Fujii, Koji Okada, Tatsuyuki Matsushita, Ryotaro Hayashi
  • Patent number: 9813386
    Abstract: Upon receiving ciphertext data transmitted by each service apparatus, a cooperation apparatus according to an embodiment generates re encrypted data by performing re encryption processing for the ciphertext data using are encryption key. Each of the service apparatuses transmits, to the cooperation apparatus, a request to acquire user information of a user specified by an identification (ID) indicated by the ciphertext data and stored in the other service apparatus, together with the ciphertext data. Upon receiving the re encrypted data transmitted by the cooperation apparatus, the service apparatus acquires an ID by decrypting the re encrypted data using a private key, reads out user information, and transmits the user information to the other service apparatus.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: November 7, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yoshihiro Fujii, Koji Okada, Hiroyuki Mayuzumi, Masahisa Tajiri
  • Patent number: 9719154
    Abstract: The present invention provides a titanium slab for hot rolling which can be fed into a general purpose hot-rolling mill for producing strip coil, without passage through a breakdown process such as blooming or a straightening process, and can further suppress surface defect occurrence of the hot-rolled strip coil, and a method of producing and a method of rolling the same, characterized in that in the cast titanium slab an angle ? formed by the crystal growth direction (solidification direction) from the surface layer toward the interior and a direction parallel to the slab casting direction (longitudinal direction) is 45 to 90°, and moreover, there is a surface layer structure of 10 mm or greater whose ? is 70 to 90°, and further characterized in that a crystal grain layer of 10 mm or greater is formed whose C-axis direction inclination of a titanium ? phase is, as viewed from the side of the slab to be hot rolled, in the range of 35 to 90° from the normal direction of the surface to be hot rolled.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: August 1, 2017
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, TOHO TITANIUM CO., LTD.
    Inventors: Kazuhiro Takahashi, Tomonori Kunieda, Kenichi Mori, Hiroaki Otsuka, Hideki Fujii, Yoshihiro Fujii, Yoshimasa Miyazaki, Takashi Oda, Hisamune Tanaka, Osamu Tada
  • Patent number: 9698984
    Abstract: In a decryption apparatus according to an embodiment, a holding device pre-holds a verification formula. A determination device performs a calculation based on the verification formula read from the holding device by substituting, into the verification formula, the part of the re-encrypted data received from a re-encryption apparatus and the public key of a re-encryption key generation apparatus and the private key of the decryption apparatus, to determine whether or not the verification formula holds true. An output device outputs verification success when a result of the determination indicates that the verification formula holds true.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: July 4, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yoshihiro Fujii, Takuya Yoshida, Koji Okada
  • Publication number: 20170177683
    Abstract: According to one embodiment, there is provided an anonymization system including at least one encryption apparatus, an anonymization apparatus, and a decryption apparatus. The encryption apparatus store personal data including one or more values for each item, and generates encrypted data from the personal data by encrypting the one or more values for each item included in the personal data. The anonymization apparatus generates encrypted anonymized data from the encrypted data without decryption by anonymizing one or more values for at least a portion of the items of the encrypted data. The decryption apparatus generates anonymized data from the encrypted anonymized data by decrypting the encrypted anonymized data.
    Type: Application
    Filed: February 28, 2017
    Publication date: June 22, 2017
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Masanobu KOIKE, Yoshihiro FUJII
  • Patent number: 9635001
    Abstract: A re-encryption system according to this embodiment includes a file sharing apparatus and a re-encryption apparatus. Upon receiving a file request from the client apparatus, the file sharing apparatus acquires a first encrypted file based on the file request, and transmits a re-encryption request including the first encrypted file to the re-encryption apparatus. The re-encryption apparatus re-encrypts the first encrypted file included in the re-encryption request to the second encrypted file based on the re-encryption key, and transmits the second encrypted file to the file sharing apparatus. The file sharing apparatus transmits the second encrypted file to the client apparatus. The client apparatus obtains the file by decrypting the second encrypted file based on a private key corresponding to the public key of the member.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: April 25, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yuki Kaseda, Takuya Yoshida, Yoshihiro Fujii, Shingo Abe, Masataka Yamada
  • Publication number: 20160380768
    Abstract: A data management device according to an embodiment stores first encrypted data obtained by encrypting plain text data with a first public key of a first user device. The data management device stores a first re-encryption key for re-encrypting the first encrypted data without decrypting to obtain first re-encrypted data decryptable with a private key of a second user device. The data management device stores a conversion key generated from a first private key corresponding to the first public key and a second private key of the first user device. The data management device converts the first encrypted data into second encrypted data with the conversion key. The data management device The data management device converts the first re-encryption key into a second re-encryption key with the conversion key.
    Type: Application
    Filed: September 7, 2016
    Publication date: December 29, 2016
    Applicants: Kabushiki Kaisha Toshiba, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Masanobu KOIKE, Yoshihiro FUJII
  • Patent number: 9426131
    Abstract: A server apparatus according to an embodiment generates a random number on receiving from a user apparatus a notification showing that a re-encryption key should be updated, and calculates re-encryption key data on the basis of the re-encryption key stored and the random number generated. The server apparatus transmits the re-encryption key to the user apparatus and receives, from the user apparatus, the user private key not updated yet and re-encryption key updating data calculated from the re-encryption key data on the basis of the user private key updated. The server apparatus calculates the re-encryption key updated, on the basis of the re-encryption key updating data and the random number, and replaces the re-encryption key stored in the storage device with the updated re-encryption key.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: August 23, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Ryotaro Hayashi, Tatsuyuki Matsushita, Yoshihiro Fujii, Takuya Yoshida, Koji Okada
  • Patent number: 9386016
    Abstract: An authentication device receives each authentication context including an output information block, an input information block, and an authenticator block. The output information block includes a process result and process result identification information. The input information block includes a process result and process result identification information. The authentication device verifies each authenticator block. The authentication device searches for the output information block having the same value of process result identification information as the value of process result identification information in the input information block from other authentication contexts based on process result identification information in the input information block included in each authentication context.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: July 5, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Hidehisa Takamizawa, Asahiko Yamada, Tomoaki Morijiri, Koji Okada, Tatsuro Ikeda, Minoru Nishizawa, Yoshihiro Fujii
  • Publication number: 20160119292
    Abstract: A re-encryption system according to this embodiment includes a file sharing apparatus and a re-encryption apparatus. Upon receiving a file request from the client apparatus, the file sharing apparatus acquires a first encrypted file based on the file request, and transmits a re-encryption request including the first encrypted file to the re-encryption apparatus. The re-encryption apparatus re-encrypts the first encrypted file included in the re-encryption request to the second encrypted file based on the re-encryption key, and transmits the second encrypted file to the file sharing apparatus. The file sharing apparatus transmits the second encrypted file to the client apparatus. The client apparatus obtains the file by decrypting the second encrypted file based on a private key corresponding to the public key of the member.
    Type: Application
    Filed: May 9, 2014
    Publication date: April 28, 2016
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Yuki KASEDA, Takuya YOSHIDA, Yoshihiro FUJII, Shingo ABE, Masataka YAMADA
  • Patent number: 9246683
    Abstract: A re-encryption key generator according to an embodiment generates a re-encryption key required to re-encrypt, without decrypting, ciphertext data obtained by encrypting plaintext data by means of a first public key of a first user device to obtain re-encrypted text data which can be decrypted by a second private key of a second user device. The first storage device stores a first private key corresponding to the first public key. The second storage device stores a second public key corresponding to the second private key. The re-encryption key generation device generates the re-encryption key based on the first private key, the second public key, and the first random number.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: January 26, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Ryotaro Hayashi, Tatsuyuki Matsushita, Yoshihiro Fujii, Takuya Yoshida, Koji Okada
  • Patent number: 9197410
    Abstract: According to one embodiment, a master key management device generates, by using a first secret key stored in a first storage unit and a third public key, a re-encryption key used to re-encrypt a second secret key which is stored in a second storage unit and which is encrypted with a first public key to the second secret key encrypted with the third public key. A key management server device receives the generated re-encryption key from the master key management device while the master key management device and the key management server device are connected to each other, and stores the received re-encryption key in a third storage unit. The master key management device and the key management server device are disconnected after the re-encryption key is stored in the third storage unit.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: November 24, 2015
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Takuya Yoshida, Yoshihiro Fujii
  • Publication number: 20150200917
    Abstract: Upon receiving ciphertext data transmitted by each service apparatus, a cooperation apparatus according to an embodiment generates re-encrypted data by performing re-encryption processing for the ciphertext data using a re-encryption key. Each of the service apparatuses transmits, to the cooperation apparatus, a request to acquire user information of a user specified by an ID indicated by the ciphertext data and stored in the other service apparatus, together with the ciphertext data. Upon receiving the re-encrypted data transmitted by the cooperation apparatus, the service apparatus acquires an ID by decrypting the re-encrypted data using a private key, reads out user information, and transmits the user information to the other service apparatus.
    Type: Application
    Filed: March 25, 2015
    Publication date: July 16, 2015
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yoshihiro FUJII, Koji Okada, Hiroyuki Mayuzumi, Masahisa Tajiri
  • Publication number: 20150180661
    Abstract: A re-encryption key generator according to an embodiment generates a re-encryption key to obtain re-encrypted data that can be decrypted by a second private key of a second user device by re-encrypting ciphertext obtained by encrypting plaintext by a first public key of a first user device without decryption. The re-encryption key generator stores a first private key corresponding to the first public key. The re-encryption key generator stores a second re-encryption key generation key of the second user device that is different from a second public key corresponding to the second private key. The re-encryption key generator generates the re-encryption key based on the first private key and the second re-encryption key generation key.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 25, 2015
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yoshihiro FUJII, Koji OKADA, Tatsuyuki MATSUSHITA, Ryotaro HAYASHI