Patents by Inventor Masahiro Nakagawa
Masahiro Nakagawa 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).
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Publication number: 20220140991Abstract: [Problem] To reduce a time synchronization error caused by upstream and downstream asymmetry of the transmission path, improve wavelength band utilization efficiency, and reduce the required number of transponders. [Solution] An optical transmission device of each node simultaneously sends a plurality of signals having different wavelengths as delay measurement signals to a transmission path. The optical transmission device determines a delay value that reflects a propagation delay calculated based on an arrival time difference between a plurality of wavelengths in a signal received from another node, and determines a waiting time amount based on the delay value and the propagation delay. The optical transmission device notifies the other node of the delay value. Each optical transmission device outputs the received signal from the other node with a delay of the waiting time amount.Type: ApplicationFiled: February 13, 2020Publication date: May 5, 2022Inventors: Masahiro NAKAGAWA, Kaoru ARAI, Hiroki SAKUMA, Shunichi TSUBOI
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Publication number: 20220103281Abstract: A time synchronization mechanism is provided for reducing influences of link asymmetry between time synchronization devices. A second transmission device 2 includes: a transmission section 16 configured to transmit packets for delay calculation for a plurality of wavelengths to the corresponding time transmission device simultaneously; and a reception section 17 configured to calculate a propagation delay Dms on a path from the corresponding time transmission device to the second transmission device 2 based on a difference between the arrival times of the packets for delay calculation for the plurality of wavelengths received from the corresponding time transmission device, receive a propagation delay Dsm on a path from the second transmission device 2 to the corresponding time transmission device calculated by the corresponding time transmission device, and calculate a propagation delay Dmax that is larger than any of the propagation delay Dms and the propagation delay Dsm.Type: ApplicationFiled: February 6, 2020Publication date: March 31, 2022Inventors: Masahiro NAKAGAWA, Kaoru ARAI, Hiroki SAKUMA, Shunichi TSUBOI
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Publication number: 20220078736Abstract: [Problem] An object is to obtain a time quality of another GM with high accuracy on the basis of a GM a time quality of which is known already. [Solution] A first TC 20 includes a time comparison unit 23 that calculates time difference information by comparing first time information of a first PTP processing unit 12 and second time information of a second PTP processing unit 22 with each other. In addition, a quality calculation device 5 measures time difference information until time difference information obtained by a time comparison unit 23 of the first TC 20 and time difference information obtained by a time comparison unit 43 of a second TC 40 match each other, and obtains a GM time quality of a second GM 30 on the basis of a transmission time error of the time transmission network 2 at a timing when both of pieces of the time difference information match each other.Type: ApplicationFiled: November 28, 2019Publication date: March 10, 2022Inventors: Kaoru Arai, Hiroki Sakuma, Masahiro NAKAGAWA, Shunichi Tsuboi
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Publication number: 20220060310Abstract: [Problem to be Solved] Optimizing a route of time synchronization in a network including apparatuses with different types of precision classes. [Solution to the Problem] A time transmission system includes BC nodes 200 with different types of apparatus performances, and multiple routes of PTP packets from GM nodes 101 and 102 to a BC node 220 via the BC node 200 are present. Each BC node 200 located upstream on a route performs notification of performance information indicating its apparatus performance to the BC node 200 located downstream with respect thereto. The BC node 220 includes a determination index calculation unit 11 that calculates a determination index for each route by referencing the performance information notified from the BC nodes 200 located upstream on each route, and a route selection unit 12 that selects a route for transmitting and receiving PTP packets from multiple routes of PTP packets to the BC node 220, based on the calculated determination index for each route.Type: ApplicationFiled: December 6, 2019Publication date: February 24, 2022Inventors: Kaoru ARAI, Hiroki SAKUMA, Masahiro NAKAGAWA, Shunichi TSUBOI
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Patent number: 11251868Abstract: An object is to provide a dispersion compensating system with a large amount of dispersion compensation and reduced operation costs. Disclosed is a dispersion compensating system in which a core node and an access node are connected through a ring network, the access node includes a delay measurement unit configured to receive delay measurement signals from the core node to measure a delay between the core node and the access node, an average dispersion amount calculation unit configured to calculate an amount of dispersion compensation to be applied to an optical burst signal prior to transmission to the ring network, based on the delay thus measured, and a real-part inverse dispersion application unit configured to perform pre-equalization on a waveform of the optical burst signal prior to the transmission, based on the calculated amount of dispersion compensation.Type: GrantFiled: June 20, 2019Date of Patent: February 15, 2022Assignee: Nippon Telegraph and Telephone CorporationInventors: Kana Masumoto, Masahiro Nakagawa, Toshiya Matsuda, Hidetoshi Onda, Masaru Katayama
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Publication number: 20220026857Abstract: [Problem] To provide a time synchronization mechanism that is not affected by link asymmetry between time synchronization devices.Type: ApplicationFiled: November 22, 2019Publication date: January 27, 2022Inventors: Kaoru Arai, Hiroki Sakuma, Masahiro NAKAGAWA, Shunichi Tsuboi
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Publication number: 20220022151Abstract: [Problem] A time synchronization mechanism with which an impact of link asymmetry between time synchronization devices is reduced is provided. [Solution] A SW 3 used in the time transmission system in which a master node 1 and a slave node 2 performs transmission and reception of a PTP packet via the SW 3 and the time of the master node 1 is synchronized based on time information of the transmission and reception includes a delay calculator 32 that measures an intra-device delay between input and output of the PTP packet to and from the SW 3, and a delay information writing unit 33 that appends the intra-device delay measured by the delay calculator 32 to a packet subsequent to the PTP packet, and outputs the appended packet to an output destination of the PTP packet.Type: ApplicationFiled: November 22, 2019Publication date: January 20, 2022Inventors: Kaoru Arai, Hiroki Sakuma, Masahiro NAKAGAWA, Shunichi Tsuboi
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Publication number: 20210266069Abstract: [Object] An object is to provide a dispersion compensating system with a large amount of dispersion compensation and reduced operation costs. [Solution] As a dispersion compensating system in which a core node 1 and an access node 2 are connected through a ring network 3, the access node 2 includes a delay measurement unit 218 configured to receive delay measurement signals from the core node 1 to measure a delay between the core node 1 and the access node 2, an average dispersion amount calculation unit 219 configured to calculate an amount of dispersion compensation to be applied to an optical burst signal prior to transmission to the ring network 3, based on the delay thus measured, and a real-part inverse dispersion application unit 213I configured to perform pre-equalization on a waveform of the optical burst signal prior to the transmission, based on the calculated amount of dispersion compensation.Type: ApplicationFiled: June 20, 2019Publication date: August 26, 2021Inventors: Kana MASUMOTO, Masahiro NAKAGAWA, Toshiya MATSUDA, Hidetoshi ONDA, Masaru KATAYAMA
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Publication number: 20210098919Abstract: Provided is a terminal fitting that includes: a terminal connector to be electrically connected to a counterpart terminal fitting; an electric-wire connector selected from a plurality of kinds of electric-wire connectors formed separately from the terminal connector for each connection form with respect to an electric wire We to be connected physically and electrically; and a coupling structure configured as a common structure between the terminal connector and the electric-wire connectors, the coupling structure being configured to couple the terminal connector with the selected electric-wire connector.Type: ApplicationFiled: September 30, 2020Publication date: April 1, 2021Inventor: Masahiro Nakagawa
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Publication number: 20200323160Abstract: A Pentas plant having a monogenic, incompletely dominant doubled-flower gene, a method for breeding the same, and a method for providing a Pentas variety with a doubled-flower or semi-double flower phenotype are provided for the purpose of creating a doubled-flower or semi-double flower Pentas plant with voluminous florets and a high ornamental value.Type: ApplicationFiled: May 17, 2018Publication date: October 15, 2020Applicant: SAKATA SEED CORPORATIONInventors: Masahiro NAKAGAWA, Akihiro TORII
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Publication number: 20180348643Abstract: An exposure apparatus includes a sensor for detecting light arriving from a projection optical system via a liquid provided on an image plane side of the projection optical system. The sensor includes a light transmissive member provided on a stage and a light receiving element for receiving light arriving from the projection optical system via the light transmissive member. The light transmissive member includes a first surface and a second surface. The first surface is arranged on the stage, comes into contact with the liquid, and is a surface on which the light arriving from the projection optical system is incident via the liquid. At least one of the first and second surfaces diffuses or diffracts the light having arrived from the projection optical system. The light receiving element receives the light that has been diffused or diffracted.Type: ApplicationFiled: July 13, 2018Publication date: December 6, 2018Applicant: NIKON CORPORATIONInventors: Hisashi NISHINAGA, Ikuo HIKIMA, Mitsunori TOYODA, Masahiro NAKAGAWA, Tsuneyuki HAGIWARA, Yasushi MIZUNO, Naonori KITA, Osamu TANITSU, Nozomu EMURA
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Patent number: 10025194Abstract: An exposure apparatus includes an optical member that can be provided on a stage. The optical member has a first surface contacting a liquid when moved to face a projection system, and a second surface contacting a gas and transmitting light having come from the projection system via the liquid and the first surface. The optical member is configured such that at least a large-angle ray of the light, which has an angle with an optical axis of the projection system sufficiently large to undergo total reflection at an end surface of the projection system when the liquid is absent, travels from the projection system to the second surface without passing through gas. The second surface transmits the large-angle ray, which is received by the light-receiving surface.Type: GrantFiled: December 5, 2016Date of Patent: July 17, 2018Assignee: NIKON CORPORATIONInventors: Hisashi Nishinaga, Ikuo Hikima, Mitsunori Toyoda, Masahiro Nakagawa, Tsuneyuki Hagiwara, Yasushi Mizuno, Naonori Kita, Osamu Tanitsu, Nozomu Emura
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Publication number: 20180098767Abstract: An anastomosis device 3 includes a corrugated circumference section (20;120;120?), a top-side slender member (10A-1;110A-1), and a bottom-side slender member (10B-1;110B-12). The top-side slender member (10A-1;110A-1) is connected to one top section (20A-1;30A-1;120A-1) of the corrugated circumference section (20; 120;120?). The bottom-side slender member (10B-1;110B-12) is connected to one (20B-1;30B-1;120B-12) at the corrugated circumference section (20;120;120?).Type: ApplicationFiled: February 24, 2016Publication date: April 12, 2018Inventors: Shunji SARUKAWA, Hideaki KAMOCHI, Keita INOUE, Noriko SAEGUSA, Masahiro NAKAGAWA, Kunihiro OHTA
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Patent number: 9883262Abstract: An optical network system includes a master node and a plurality of optical switch nodes, allowing the number of nodes without depending on the number of wavelengths. The master node is configured to: divide a wavelength path having an arbitrary wavelength into time slots each having a predetermined time period; and allocate the time slots to each of the optical switch nodes. Each of the optical switch nodes is configured to: synchronize the time slots based on information delivered from the master node; and thereby transmit or receive a data or performs route switching.Type: GrantFiled: June 13, 2013Date of Patent: January 30, 2018Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kyota Hattori, Naoki Kimishima, Masahiro Nakagawa, Masaru Katayama, Akira Misawa
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Publication number: 20170082925Abstract: An exposure apparatus includes an optical member that can be provided on a stage. The optical member has a first surface contacting a liquid when moved to face a projection system, and a second surface contacting a gas and transmitting light having come from the projection system via the liquid and the first surface. The optical member is configured such that at least a large-angle ray of the light, which has an angle with an optical axis of the projection system sufficiently large to undergo total reflection at an end surface of the projection system when the liquid is absent, travels from the projection system to the second surface without passing through gas. The second surface transmits the large-angle ray, which is received by the light-receiving surface.Type: ApplicationFiled: December 5, 2016Publication date: March 23, 2017Applicant: NIKON CORPORATIONInventors: Hisashi NISHINAGA, Ikuo HIKIMA, Mitsunori TOYODA, Masahiro NAKAGAWA, Tsuneyuki HAGIWARA, Yasushi MIZUNO, Naonori KITA, Osamu TANITSU, Nozomu EMURA
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Patent number: 9513558Abstract: An exposure apparatus irradiates a substrate with light via a projection system and liquid, and includes a stage that moves below the projection system, and a light-receiving element having a light-receiving surface. An optical member provided on the stage has a first surface contacting the liquid when moved to face the projection system, and a second surface contacting a gas and transmitting light having come from the projection system via the liquid and the first surface. The optical member is configured such that at least a large-angle ray of the light, which has an angle with an optical axis of the projection system sufficiently large to undergo total reflection at an end surface of the projection system when the liquid is absent, travels from the projection system to the second surface without passing through gas. The second surface transmits the large-angle ray, which is received by the light-receiving surface.Type: GrantFiled: May 2, 2014Date of Patent: December 6, 2016Assignee: NIKON CORPORATIONInventors: Hisashi Nishinaga, Ikuo Hikima, Mitsunori Toyoda, Masahiro Nakagawa, Tsuneyuki Hagiwara, Yasushi Mizuno, Naonori Kita, Osamu Tanitsu, Nozomu Emura
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Publication number: 20150131991Abstract: An optical network system includes a master node and a plurality of optical switch nodes, allowing the number of nodes without depending on the number of wavelengths. The master node is configured to: divide a wavelength path having an arbitrary wavelength into time slots each having a predetermined time period; and allocate the time slots to each of the optical switch nodes. Each of the optical switch nodes is configured to: synchronize the time slots based on information delivered from the master node; and thereby transmit or receive a data or performs route switching.Type: ApplicationFiled: June 13, 2013Publication date: May 14, 2015Inventors: Kyota Hattori, Naoki Kimishima, Masahiro Nakagawa, Masaru Katayama, Akira Misawa
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Publication number: 20140240685Abstract: An exposure apparatus irradiates a substrate with light via a projection system and liquid, and includes a stage that moves below the projection system, and a light-receiving element having a light-receiving surface. An optical member provided on the stage has a first surface contacting the liquid when moved to face the projection system, and a second surface contacting a gas and transmitting light having come from the projection system via the liquid and the first surface. The optical member is configured such that at least a large-angle ray of the light, which has an angle with an optical axis of the projection system sufficiently large to undergo total reflection at an end surface of the projection system when the liquid is absent, travels from the projection system to the second surface without passing through gas. The second surface transmits the large-angle ray, which is received by the light-receiving surface.Type: ApplicationFiled: May 2, 2014Publication date: August 28, 2014Applicant: NIKON CORPORATIONInventors: Hisashi NISHINAGA, Ikuo HIKIMA, Mitsunori TOYODA, Masahiro NAKAGAWA, Tsuneyuki HAGIWARA, Yasushi MIZUNO, Naonori KITA, Osamu TANITSU, Nozomu EMURA
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Patent number: 8749759Abstract: A part of exposure beam through a liquid via a projection optical system enters a light-transmitting section, enters an optical member without passing through gas, and is focused. The exposure apparatus receives the exposure light from the projection optical system to perform various measurements even if the numerical aperture of the projection optical system increases.Type: GrantFiled: October 2, 2012Date of Patent: June 10, 2014Assignee: Nikon CorporationInventors: Hisashi Nishinaga, Ikuo Hikima, Mitsunori Toyoda, Masahiro Nakagawa, Tsuneyuki Hagiwara, Yasushi Mizuno, Naonori Kita, Osamu Tanitsu, Nozomu Emura
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Publication number: 20140030296Abstract: A method for enhancing a vaccine therapy effect by a vaccine composition. The method including a step of implanting ?-tricalcium phosphate in an inside of a body of a subject, and a step of administering the vaccine composition to the subject at the same time with or before or after the implanting step.Type: ApplicationFiled: July 23, 2013Publication date: January 30, 2014Applicants: SHIZUOKA PREFECTURE, OLYMPUS CORPORATIONInventors: Kouji MARUYAMA, Mitsuru TAKAHASHI, Masahiro NAKAGAWA, Yasuto AKIYAMA, Hidee ISHII, Jinyan CHENG