Patents by Inventor Masahiro Fujiwara

Masahiro Fujiwara 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: 20240089093
    Abstract: An object is to prevent eavesdropping in quantum key distribution. A decoding unit decodes a quantum signal incident thereinto. A plurality of detect photons of the decoded quantum signal output from the decoding unit. A signal processing unit detects bits of the decoded quantum signal based on photon detection results of the plurality of detectors. A control unit perform switching processing by switching destinations to which two decoded quantum signals corresponding to one encoding basis are output between the plurality of detectors, and switching the bits detected by the signal processing unit based on the respective photon detection results of the plurality of detectors.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 14, 2024
    Applicants: NEC CORPORATION, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, THE UNIVERSITY OF TOKYO
    Inventors: Ken-ichiro YOSHINO, Mikio FUJIWARA, Akihisa TOMITA, Masato KOASHI, Masahiro TAKEOKA, Masahide SASAKI
  • Publication number: 20240080184
    Abstract: An object is to prevent eavesdropping in quantum key distribution. A photon detector outputs an output current indicating a result of detecting a quantum signal. A current-voltage conversion unit converts the output current into an output voltage signal. An analog-to-digital converter outputs an output voltage signal obtained by analog-digital conversion of the output voltage signal. A signal processing unit performs predetermined signal processing on the output voltage signal, and outputs a photon detection signal indicating a result of detecting the quantum signal. When a time difference between a timing at which the quantum signal is incident into the photon detector and a reference timing determined based on a clock signal is not within a determination range, the photon detection signal is not output from the signal processing unit.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 7, 2024
    Applicants: NEC Corporation, National Institute of Information and Communications Technology, NATIONAL UNIVERSTIY CORPORATION HOKKAIDO UNIVERSTIY, The University of Tokyo
    Inventors: Ken-ichiro YOSHINO, Mikio FUJIWARA, Akihisa TOMITA, Masato KOASHI, Masahiro TAKEOKA, Masahide SASAKI
  • Patent number: 11735840
    Abstract: An electrical connection box is provided with a conductive bus bar, an insulating housing body, a cover, and a power supply line. The cover opens or closes with respect to the housing body at a fully open position and a fully closed position. The housing body has a connector at a position exposed to the outside, with the connector configured so that a terminal provided at a tip of the power supply line is attachable or detachable to or from the connector. A restriction portion, which restricts the power supply line from moving in the longitudinal direction is provided in the cover. In the state where the terminal is connected to the connector, the tension is created on the power supply line in the longitudinal direction by the restriction portion during moving the cover from the fully closed position to the fully open position side.
    Type: Grant
    Filed: March 17, 2022
    Date of Patent: August 22, 2023
    Assignee: YAZAKI CORPORATION
    Inventors: Kazuki Kobayashi, Kohei Toyoshima, Kenji Segawa, Masahiro Fujiwara
  • Patent number: 11554476
    Abstract: The power tool has a housing portion that accommodates a motor (6) and a cooling fan (8), and a handle portion (5B). Air suction ports (41, 42a-42d and 43) are arranged in the housing portion, and outside air is sucked into the housing portion by the rotation of the cooling fan. In the power tool, a passage (52) is formed in the handle portion, the passage guiding cooling air from the air suction port (41) rearward away from the cooling fan; the cooling air is caused to flow from an opening (53) into the handle portion to cool a heat-generation mechanism included in a switch mechanism (60); and the cooling air is again returned to the housing portion. In the housing portion, the cooling air is discharged to the outside from air discharge ports (13a and 13b) together with the cooling air from the other air suction ports.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: January 17, 2023
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Tomohiro Ejiri, Masahiro Fujiwara
  • Publication number: 20220297620
    Abstract: An electrical connection box includes an insulating connection box housing and an insulating branch box housing. The insulating connection box housing stores a conductive connection box bus bar therein, and the insulating branch box housing stores a conductive branch box bus bar therein. The branch box housing and the connection box housing are stacked in a vertical direction. The connection box bus bar and the branch box bus bar are electrically connected by bringing connection box bus bar tip portions of the connection box bus bar into direct contact with branch box bus bar tip portions of the branch box bus bar and by jointly fastening the tip portions using bus bar fastening members.
    Type: Application
    Filed: March 17, 2022
    Publication date: September 22, 2022
    Inventors: Kazuki Kobayashi, Kohei Toyoshima, Kenji Segawa, Masahiro Fujiwara
  • Publication number: 20220302610
    Abstract: An electrical connection box is provided with a conductive bus bar, an insulating housing body, a cover, and a power supply line. The cover opens or closes with respect to the housing body at a fully open position and a fully closed position. The housing body has a connector at a position exposed to the outside, with the connector configured so that a terminal provided at a tip of the power supply line is attachable or detachable to or from the connector. A restriction portion, which restricts the power supply line from moving in the longitudinal direction is provided in the cover. In the state where the terminal is connected to the connector, the tension is created on the power supply line in the longitudinal direction by the restriction portion during moving the cover from the fully closed position to the fully open position side.
    Type: Application
    Filed: March 17, 2022
    Publication date: September 22, 2022
    Inventors: Kazuki Kobayashi, Kohei Toyoshima, Kenji Segawa, Masahiro Fujiwara
  • Patent number: 10864710
    Abstract: The disclosure provides a film wherein an outer layer includes a polypropylene resin, an intermediate layer includes a polypropylene resin and a hydrogenated block copolymer (a), and an inner layer includes a polypropylene resin.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: December 15, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Noriko Yagi, Yasuhiro Kusanose, Hiroyuki Ichino, Masahiro Fujiwara
  • Patent number: 10829880
    Abstract: A portable washing unit, which is capable of automatically carrying out various types of washing treatments respectively. A portable washing unit is provided with a driving unit, which is configured to be drivable in a state where an accessory at least capable of executing a washing treatment and serving as a washing mechanism is connected, and is attachable and detachable for various accessories capable of performing washing-related treatments.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: November 10, 2020
    Assignees: AQUA CO., LTD., QINGDAO HAIER WASHING MACHINE CO., LTD.
    Inventors: Hai Shu, Peishi Lv, Masahiro Fujiwara, Masakazu Yamamoto, Masaru Noro, Zhengtao Wang
  • Patent number: 10829632
    Abstract: The hydrogenated block copolymer according to the present invention is a hydrogenated block copolymer containing, in the molecule, a polymer block (C) having a conjugated diene compound as a main component, a polymer block (B) having a conjugated diene compound as a main component, and a polymer block (S) having a vinyl aromatic compound as a main component.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 10, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Hiroyuki Ichino, Yasuhiro Kusanose, Masashi Yamamoto, Masahiro Fujiwara
  • Publication number: 20200331138
    Abstract: The power tool has a housing portion that accommodates a motor (6) and a cooling fan (8), and a handle portion (5B). Air suction ports (41, 42a-42d and 43) are arranged in the housing portion, and outside air is sucked into the housing portion by the rotation of the cooling fan. In the power tool, a passage (52) is formed in the handle portion, the passage guiding cooling air from the air suction port (41) rearward away from the cooling fan; the cooling air is caused to flow from an opening (53) into the handle portion to cool a heat-generation mechanism included in a switch mechanism (60); and the cooling air is again returned to the housing portion. In the housing portion, the cooling air is discharged to the outside from air discharge ports (13a and 13b) together with the cooling air from the other air suction ports.
    Type: Application
    Filed: November 30, 2018
    Publication date: October 22, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Tomohiro EJIRI, Masahiro FUJIWARA
  • Patent number: 10808066
    Abstract: A hydrogenated copolymer comprising a copolymer block A comprising a vinyl aromatic compound monomer unit and a conjugated diene monomer unit, wherein a tan ? peak obtained by dynamic viscoelasticity measurement (1 Hz) is in the range of ?40° C. to 20° C., a value of the tan ? peak is 0.8 or more, and a half value width of the tan ? peak is 22° C. or less.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 20, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yuta Kamei, Toshikazu Hoshina, Yasuhiro Kusanose, Masahiro Fujiwara
  • Patent number: 10703848
    Abstract: The present invention provides a hydrogenated block copolymer containing, in the molecule thereof, a polymer block (C) having a conjugated diene compound as a main component, a polymer block (B) having a conjugated diene compound as a main component, and a polymer block (S) having a vinyl aromatic compound as a main component.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: July 7, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yasuhiro Kusanose, Hiroyuki Ichino, Masashi Yamamoto, Masahiro Fujiwara, Toshikazu Hoshina
  • Patent number: 10661427
    Abstract: A power tool has a fan guide for straightening the flow of cooling air generated by a fan, wherein the branching passages through are provided for causing a portion of the cooling air drawn into the fan from a ventilation hole to diverge from a flow toward an exhaust port formed on a bearing guide side, and the portion of the cooling air flows toward an inlet and thereby circulates inside a housing. The branching passages through provided to the fan guide are formed so as to be inclined in the same direction as a circumferential direction so that air path resistance during actual operation (in an intermediate-speed region) does not increase.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: May 26, 2020
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Akira Matsushita, Tomomasa Nishikawa, Noriyuki Horie, Masahiro Fujiwara
  • Patent number: 10648111
    Abstract: The present disclosure provides a stain removal device capable of performing partial beating and washing on a cloth product, automatically supplying liquid and applying a beating force to a stain portion appearing on the cloth product, preventing liquid leakage and realizing miniaturization. The stain removal device includes: a cassette mechanism, which includes a head portion having a beating surface and a water supply bottle for accommodating liquid, where water supply paths are from the water supply bottle and throughout the head portion; and a device main body, which includes a vibration unit mountable by pressing the cassette mechanism and detachable by pulling out the vibration unit and is configured to apply a vibration to the cassette mechanism towards a direction substantially orthogonal to the beating surface of the head portion through supplied electric power.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: May 12, 2020
    Assignees: QINGDAO HAIER WASHING MACHINE CO., LTD., AQUA CO., LTD
    Inventors: Masahiro Fujiwara, Masakazu Yamamoto, Masaru Noro
  • Patent number: 10549320
    Abstract: A stain removal device, a head portion having a beating surface; a vibration unit which is located on an extension line of an axis of the head portion orthogonal to the beating surface and vibrates the head portion in an axis direction through driving of a solenoid actuator; and a liquid supply unit which has a liquid accommodating portion capable of accommodating liquid and supplies the liquid in the liquid accommodating portion to the beating surface through vibration of the head portion generated by the vibration unit.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: February 4, 2020
    Assignees: HAIER ASIA CO., LTD., QINGDAO HAIER WASHING MACHINE CO., LTD.
    Inventors: Hai Shu, Peishi Lv, Masahiro Fujiwara, Masakazu Yamamoto, Masaru Noro, Zhengtao Wang
  • Patent number: 10544251
    Abstract: A tube including a hydrogenated block copolymer (a), wherein the hydrogenated block copolymer (a) includes, in a molecule, a polymer block mainly including a conjugated diene compound (C), a polymer block mainly including a conjugated diene compound (B), and a polymer block mainly including a vinyl aromatic compound (S).
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 28, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yasuhiro Kusanose, Hiroyuki Ichino, Noriko Yagi, Masahiro Fujiwara
  • Publication number: 20190136040
    Abstract: The hydrogenated block copolymer according to the present invention is a hydrogenated block copolymer containing, in the molecule, a polymer block (C) having a conjugated diene compound as a main component, a polymer block (B) having a conjugated diene compound as a main component, and a polymer block (S) having a vinyl aromatic compound as a main component.
    Type: Application
    Filed: April 24, 2017
    Publication date: May 9, 2019
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Hiroyuki Ichino, Yasuhiro Kusanose, Masashi Yamamoto, Masahiro Fujiwara
  • Publication number: 20190039228
    Abstract: A power tool has a fan guide for straightening the flow of cooling air generated by a fan, wherein the branching passages through are provided for causing a portion of the cooling air drawn into the fan from a ventilation hole to diverge from a flow toward an exhaust port formed on a bearing guide side, and the portion of the cooling air flows toward an inlet and thereby circulates inside a housing. The branching passages through provided to the fan guide are formed so as to be inclined in the same direction as a circumferential direction so that air path resistance during actual operation (in an intermediate-speed region) does not increase.
    Type: Application
    Filed: January 27, 2017
    Publication date: February 7, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Akira MATSUSHITA, Tomomasa NISHIKAWA, Noriyuki HORIE, Masahiro FUJIWARA
  • Patent number: D951735
    Type: Grant
    Filed: August 23, 2020
    Date of Patent: May 17, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Takeshi Taniguchi, Shinichi Kakefuda, Masahiro Fujiwara, Tomohiro Ejiri
  • Patent number: RE49414
    Abstract: A power tool has a fan guide for straightening the flow of cooling air generated by a fan, wherein the branching passages through are provided for causing a portion of the cooling air drawn into the fan from a ventilation hole to diverge from a flow toward an exhaust port formed on a bearing guide side, and the portion of the cooling air flows toward an inlet and thereby circulates inside a housing. The branching passages through provided to the fan guide are formed so as to be inclined in the same direction as a circumferential direction so that air path resistance during actual operation (in an intermediate-speed region) does not increase.
    Type: Grant
    Filed: May 4, 2021
    Date of Patent: February 14, 2023
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Akira Matsushita, Tomomasa Nishikawa, Noriyuki Horie, Masahiro Fujiwara