Patents by Inventor Shigeru Ishii

Shigeru Ishii 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: 20250240094
    Abstract: An optical transmission path characteristic estimation device that estimates a polarization characteristic value of an optical path in which first sections that are in service operation of an optical communication service that uses a plurality of wavelengths and second sections that are out of the service operation are mixed, the optical transmission path characteristic estimation device includes a memory, and a processor coupled to the memory and configured to acquire first polarization characteristic values for each of the plurality of wavelengths in the first sections, and acquires second polarization characteristic values for each of the plurality of wavelengths in the second sections, based on information that represent an operation state of the optical communication service, and calculate wavelength-specific polarization characteristic values of the optical path for each of the plurality of wavelengths, based on the first polarization characteristic values and the second polarization characteristic valu
    Type: Application
    Filed: December 18, 2024
    Publication date: July 24, 2025
    Applicant: Fujitsu Limited
    Inventors: Setsuo YOSHIDA, Shoichiro ODA, Yasuko NOZU, Kazuyuki TAJIMA, Shigeru ISHII, Tatsuya TSUZUKI, Takehiro FUJITA
  • Patent number: 12334979
    Abstract: An optical wavelength multiplexing transmission device includes: a demultiplexer configured to demultiplex a wavelength multiplexing signal for each wavelength band from a multiplexed signal that includes wavelength multiplexing signals in a plurality of the wavelength bands; a processor configured to detect an optical power value of each wavelength multiplexing signal for each wavelength band; calculate a compensation amount used to compensate a tilt of the wavelength multiplexing signal, by using the optical power value and a predetermined calculation expression; and compensate the tilt of the wavelength multiplexing signal, based on the compensation amount; and a multiplexer configured to multiplex each wavelength multiplexing signal compensated by the processor and output the wavelength multiplexing signal to a transmission line.
    Type: Grant
    Filed: November 3, 2022
    Date of Patent: June 17, 2025
    Assignee: Fujitsu Limited
    Inventors: Shigeru Ishii, Tatsuya Tsuzuki, Takehiro Fujita, Tomoaki Takeyama
  • Publication number: 20250183750
    Abstract: A device includes: a rotation electrical machine including a rotor and a stator surrounding an outer periphery of the rotor; and a case surrounding an outer periphery of a stator core of the stator, a liquid is supplied to an upper portion of the stator core, a guide portion that guides the liquid to one side in a direction of a rotation axis of the rotor is provided on an inner periphery of the case in a direction along the direction of the rotation axis, when viewed from the direction of the rotation axis, the guide portion is located above a horizontal line passing through the rotation axis, and one end of the guide portion in the direction of the rotation axis is disposed outside a vertical line passing through an air gap between a rotor core of the rotor and the stator core when viewed from the direction of the rotation axis.
    Type: Application
    Filed: November 29, 2022
    Publication date: June 5, 2025
    Applicant: JATCO Ltd
    Inventors: Daiki TANAKA, Atsushi MAEDA, Akihiro KOYAMA, Shigeru ISHII
  • Patent number: 12108582
    Abstract: An electronic device protection unit is provided. The electronic device protection unit includes a sensing part, a responding part, and an analysis and control part. The sensing part is configured to detect an incident ray which is electromagnetic wave or radiation with potential to cause destruction (damage), failure, or malfunction of an electronic device. The responding part is configured to be able to perform a plurality of behaviors to protect the electronic device. The analysis and control part is configured to control the behaviors of the responding part in response to a type of the incident ray detected by the sensing part.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: October 1, 2024
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Naohisa Anabuki, Masaki Kusano, Shigeru Ishii
  • Publication number: 20230239050
    Abstract: An optical wavelength multiplexing transmission device includes: a demultiplexer configured to demultiplex a wavelength multiplexing signal for each wavelength band from a multiplexed signal that includes wavelength multiplexing signals in a plurality of the wavelength bands; a processor configured to detect an optical power value of each wavelength multiplexing signal for each wavelength band; calculate a compensation amount used to compensate a tilt of the wavelength multiplexing signal, by using the optical power value and a predetermined calculation expression; and compensate the tilt of the wavelength multiplexing signal, based on the compensation amount; and a multiplexer configured to multiplex each wavelength multiplexing signal compensated by the processor and output the wavelength multiplexing signal to a transmission line.
    Type: Application
    Filed: November 3, 2022
    Publication date: July 27, 2023
    Applicant: Fujitsu Limited
    Inventors: Shigeru ISHII, Tatsuya Tsuzuki, Takehiro Fujita, Tomoaki Takeyama
  • Publication number: 20230199350
    Abstract: An optical switching device including: an input unit to which multichannel light beams are redundantly input; a channel tunable optical filter that confirms, from the received multichannel light beams, whether correct input of a channel for an output destination is included; and an optical switch that outputs, to an optical transfer device which is the output destination, any one of the multichannel light beams that includes the channel which has been correctly input.
    Type: Application
    Filed: February 13, 2023
    Publication date: June 22, 2023
    Applicant: Fujitsu Limited
    Inventors: Tatsuya TSUZUKI, Shigeru ISHII, Takehiro FUJITA
  • Publication number: 20220015274
    Abstract: An electronic device protection unit is provided. The electronic device protection unit includes a sensing part, a responding part, and an analysis and control part. The sensing part is configured to detect an incident ray which is electromagnetic wave or radiation with potential to cause destruction (damage), failure, or malfunction of an electronic device. The responding part is configured to be able to perform a plurality of behaviors to protect the electronic device. The analysis and control part is configured to control the behaviors of the responding part in response to a type of the incident ray detected by the sensing part.
    Type: Application
    Filed: February 3, 2020
    Publication date: January 13, 2022
    Inventors: Naohisa ANABUKI, Masaki KUSANO, Shigeru ISHII
  • Patent number: 11115035
    Abstract: A semiconductor device includes first to N-th PLL circuits configured to operate in synchronization with a common reference clock signal to output first to N-th clock signals, respectively; a majority circuit that performs a majority operation on the first to N-th clock signals to generate a majority clock signal; and a filter circuit to which the majority clock signal is provided, the filter circuit operating as a low-pass filter to output an output clock signal. N is an odd number of three or more.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: September 7, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takanori Narita, Daisuke Matsuura, Shigeru Ishii, Daisuke Kobayashi, Kazuyuki Hirose, Osamu Kawasaki
  • Publication number: 20210099180
    Abstract: A semiconductor device includes first to N-th PLL circuits configured to operate in synchronization with a common reference clock signal to output first to N-th clock signals, respectively; a majority circuit that performs a majority operation on the first to N-th clock signals to generate a majority clock signal; and a filter circuit to which the majority clock signal is provided, the filter circuit operating as a low-pass filter to output an output clock signal. N is an odd number of three or more.
    Type: Application
    Filed: June 5, 2019
    Publication date: April 1, 2021
    Inventors: Takanori NARITA, Daisuke MATSUURA, Shigeru ISHII, Daisuke KOBAYASHI, Kazuyuki HIROSE, Osamu KAWASAKI
  • Patent number: 10541749
    Abstract: A transmission apparatus includes a demultiplexer configured to demultiplex a multiplexed signal including wavelength multiplexed signals having individual wavelength bands into a wavelength multiplexed signal for each of the wavelength bands, a detector configured to detect a power value of each of the wavelength multiplexed signals for each of the wavelength bands, first compensators configured to compensate for a tilt in the wavelength multiplexed signal based on the power value for each of the wavelength bands, second compensators configured to compensate for a power of the wavelength multiplexed signal for each of the wavelength bands so as to reduce a power difference among wavelength multiplexed signals after the tilt compensation based on the power value for each of the wavelength bands, and a multiplexer configured to multiplex each of the wavelength multiplexed signals after the power compensation and output a multiplexed signal.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: January 21, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Shigeru Ishii, Hiroki Oi, Takehiro Fujita, Tatsuya Tsuzuki
  • Publication number: 20190312641
    Abstract: A transmission apparatus includes a demultiplexer configured to demultiplex a multiplexed signal including wavelength multiplexed signals having individual wavelength bands into a wavelength multiplexed signal for each of the wavelength bands, a detector configured to detect a power value of each of the wavelength multiplexed signals for each of the wavelength bands, first compensators configured to compensate for a tilt in the wavelength multiplexed signal based on the power value for each of the wavelength bands, second compensators configured to compensate for a power of the wavelength multiplexed signal for each of the wavelength bands so as to reduce a power difference among wavelength multiplexed signals after the tilt compensation based on the power value for each of the wavelength bands, and a multiplexer configured to multiplex each of the wavelength multiplexed signals after the power compensation and output a multiplexed signal.
    Type: Application
    Filed: March 19, 2019
    Publication date: October 10, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Shigeru ISHII, Hiroki Oi, Takehiro Fujita, Tatsuya Tsuzuki
  • Patent number: 10256691
    Abstract: A motor wiring structure of the present invention relates to motor wiring for supplying electric power to coils which are respectively wound around split cores provided in a stator. The motor wiring structure includes a power supply-side terminal disposed on a power supply side, multiple coil connection-side terminals configured to be connected respectively to winding wire terminals of the coils, and multiple conductor wires each independently connecting the power supply-side terminal and one of the multiple coil connection-side terminals to each other. Moreover, the motor wiring structure includes a positioning and heat-dissipating protrusion which is provided to the coil connection-side terminal, and which is configured to position the coil connection-side terminal with respect to the stator and dissipate heat during thermal crimping with the coil.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: April 9, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Takashi Kuwahara, Shigeru Ishii, Yasunori Ishibashi
  • Patent number: 10158422
    Abstract: There is provided an apparatus configured to estimate optical transmission performance in a transmission path of an optical signal, the apparatus including a memory, and a processor coupled to the memory and the processor configured to acquire a first index related to a first transmission performance of an optical signal transmitted through a span group between a first node and an n-th node and a second index related to a second transmission performance of an optical signal transmitted through a span or a span group between the first node and an m-th node, wherein n is an integer of 3 or more, and m is the integer satisfying m<n, and estimate a third index related to a third transmission performance of an optical signal to be transmitted through a span between the m-th node and the n-th node, based on the first index and the second index.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: December 18, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Masatake Miyabe, Setsuo Yoshida, Yasuhiko Aoki, Toru Katagiri, Goji Nakagawa, Shigeru Ishii, Yutaka Takita
  • Patent number: 10116387
    Abstract: There is provided a control device for controlling a first transmission device and a second transmission device, the control device including a memory, and a processor coupled to the memory and the processor configured to set a first wavelength path between the first transmission device and the second transmission device, select a monitoring wavelength path from established wavelength paths allocated on a transmission line between the first transmission device and the second transmission device, monitor a signal quality of the monitoring wavelength path, and increase power of the first wavelength path, based on the signal quality of the monitoring wavelength path.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: October 30, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yutaka Takita, Shigeru Ishii
  • Patent number: 10090923
    Abstract: An information processing apparatus, includes: a memory that stores a wavelength defragmentation program; and a processor that performs, based on the wavelength defragmentation program, operations of: selecting an optical line according to a specific sequence in design information to allocate optical lines for respective optical wavelengths within a network; moving a selected optical line to a move-to optical wavelength; stopping, when movement of the selected optical line to the move-to optical wavelength is difficult, a selection of the optical line according to the specific sequence; and selecting a new optical line from optical lines indicated in a priority list.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 2, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yutaka Takita, Shigeru Ishii
  • Patent number: 9869353
    Abstract: A vehicle clutch hydraulic system for a vehicle is provided with a mechanical oil pump, an electric oil pump, a forward clutch and a control valve unit. In the vehicle clutch hydraulic system, a main pump oil passage fluidly connects the mechanical oil pump to the control valve unit. A sub-pump oil passage fluidly connects the electric oil pump to a forward clutch oil passage into which an oil passage outlet opens at an inside location closer to a clutch rotational axis than a clutch oil chamber of the forward clutch.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: January 16, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takashi Kuwahara, Shigeru Ishii
  • Publication number: 20170230113
    Abstract: An information processing apparatus, includes: a memory that stores a wavelength defragmentation program; and a processor that performs, based on the wavelength defragmentation program, operations of: selecting an optical line according to a specific sequence in design information to allocate optical lines for respective optical wavelengths within a network; moving a selected optical line to a move-to optical wavelength; stopping, when movement of the selected optical line to the move-to optical wavelength is difficult, a selection of the optical line according to the specific sequence; and selecting a new optical line from optical lines indicated in a priority list.
    Type: Application
    Filed: December 20, 2016
    Publication date: August 10, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yutaka Takita, Shigeru ISHII
  • Patent number: 9634762
    Abstract: A node apparatus is installed at a node located on a route from a start node to an end node, and includes: a parameter calculating unit configured to, upon receiving routing information specifying the route and a first parameter representing an amount of signal degradation, update the first parameter by using a second parameter representing an amount of signal degradation along a transmission route to an adjacent node, and generate a third parameter representing an amount of signal degradation along a transmission route between the start node and the node, specified by the routing information; and a determination unit configured to determine reachability of the route specified by the routing information in accordance with the third parameter and a fourth parameter representing an amount of signal degradation along a transmission route from the node to the end node specified by the routing information.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: April 25, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Shigeru Ishii, Ryosuke Goto
  • Patent number: 9458909
    Abstract: A drive power transmission device is provided that either disengages a first friction engagement element or a second friction engagement element when the other is engaged. The drive power transmission device detects the temperature of lubricating oil flowing in each friction engagement element using a temperature sensor. The drive power transmission device selectively disengages either a forward clutch or a reverse brake disengages when the other is engaged. The forward clutch and the reverse brake overlap axially, and are layered radially in an inner/outer arrangement. The temperature sensor is positioned at the periphery of the forward clutch and the reverse brake. A lubricating oil pathway is formed such that lubricating oil for cooling the forward clutch and the reverse brake passes through the forward clutch and the reverse brake in the radial direction from the inside of the forward clutch and the reverse brake to the temperature sensor.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: October 4, 2016
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takuhiro Sugimoto, Shigeru Ishii, Kazuhiro Miyachi, Takashi Kuwahara
  • Publication number: 20160211910
    Abstract: A node apparatus is installed at a node located on a route from a start node to an end node, and includes: a parameter calculating unit configured to, upon receiving routing information specifying the route and a first parameter representing an amount of signal degradation, update the first parameter by using a second parameter representing an amount of signal degradation along a transmission route to an adjacent node, and generate a third parameter representing an amount of signal degradation along a transmission route between the start node and the node, specified by the routing information; and a determination unit configured to determine reachability of the route specified by the routing information in accordance with the third parameter and a fourth parameter representing an amount of signal degradation along a transmission route from the node to the end node specified by the routing information.
    Type: Application
    Filed: March 15, 2016
    Publication date: July 21, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Shigeru ISHII, Ryosuke GOTO