Patents by Inventor Yusuke Kimata
Yusuke Kimata 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: 20230374622Abstract: A high-strength cold-rolled steel sheet comprises: a chemical composition that contains C, Si, Mn, P, S, N, Al, Ti, Nb, and B with a balance consisting of Fe and inevitable impurities, and satisfies [mol % N]/[mol % Ti]<1; and a steel microstructure in which: an area fraction of ferrite is 12% or more and less than 30%; a total area fraction of tempered martensite and bainite is 55% or more and 85% or less; an area fraction of quenched martensite is 15% or less; an area fraction of retained austenite is 1% or more and 10% or less; an area fraction of low-Mn ferrite having a Mn concentration of 0.8×[% Mn] or less is 5% or more and 20% or less; a result of subtracting the area fraction of the low-Mn ferrite from the area fraction of the ferrite is 10% or more; an area fraction of a residual microstructure is less than 3%; and an average grain size of the low-Mn ferrite is 10 ?m or less.Type: ApplicationFiled: August 5, 2021Publication date: November 23, 2023Applicant: JFE STEEL CORPORATIONInventors: Yuji TANAKA, Masaki TADA, Yuki TOJI, Shinsuke KOMINE, Yoshie OBATA, Yusuke KIMATA
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Patent number: 11739392Abstract: A high-strength steel sheet having a tensile strength TS of 1320 MPa or more and excellent workability. The high-strength steel sheet has a chemical composition containing, by mass %, C: 0.20% or more and 0.40% or less, Si: 0.5% or more and 2.5% or less, Mn: more than 2.4% and 5.0% or less, P: 0.1% or less, S: 0.01% or less, Al: 0.01% or more and 0.5% or less, N: 0.010% or less, and Fe and inevitable impurities. A microstructure of the steel sheet includes, in terms of area fraction with respect to the whole steel sheet microstructure, lower bainite in an amount of 40% or more and less than 85%, martensite including tempered martensite in an amount of 5% or more and less than 40%, retained austenite in an amount of 10% or more and 30% or less, and polygonal ferrite in an amount of 10% or less (including 0%).Type: GrantFiled: February 7, 2017Date of Patent: August 29, 2023Assignee: JFE STEEL CORPORATIONInventors: Yusuke Kimata, Yoshihiko Ono, Kenji Kawamura
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Publication number: 20230235421Abstract: A high-strength cold-rolled steel sheet comprises: a chemical composition that contains C, Si, Mn, P, S, N, Al, Ti, Nb, and B with a balance consisting of Fe and inevitable impurities, and satisfies [mol % N]/[mol % Ti]<1; and a steel microstructure in which: an area fraction of ferrite is 30% or more and 60% or less; a total area fraction of tempered martensite and bainite is 35% or more and 65% or less; an area fraction of quenched martensite is 15% or less; an area fraction of retained austenite is 1% or more and 10% or less; an area fraction of low-Mn ferrite having a Mn concentration of 0.8×[% Mn] or less is 5% or more and 40% or less; a result of subtracting the area fraction of the low-Mn ferrite from the area fraction of the ferrite is 10% or more; an area fraction of a residual microstructure is less than 3%; and an average grain size of the low-Mn ferrite is 10 ?m or less.Type: ApplicationFiled: August 5, 2021Publication date: July 27, 2023Applicant: JFE STEEL CORPORATIONInventors: Yuji TANAKA, Masaki TADA, Yuki TOJI, Shinsuke KOMINE, Yoshie OBATA, Yusuke KIMATA
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Patent number: 11111553Abstract: A high-strength steel sheet having a tensile strength (TS) of 1,320 MPa or more and good workability. The high-strength steel sheet has a specific component composition and a steel microstructure containing, on an area-percentage basis with respect to the entire steel microstructure, 40% or more and less than 85% of a lower bainite, 5% or more and less than 40% martensite including tempered martensite, 10% or more and 30% or less retained austenite, and 10% or less (including 0%) polygonal ferrite, the retained austenite having an average C content of 0.60% by mass or more. Additionally, a Mn segregation value at a surface of the steel sheet is 0.8% or less, the ratio R/t of a limit bending radius (R) to a thickness (t) of the steel sheet is 2.0 or less, and tensile strength×total elongation of the steel sheet is 15,000 MPa % or more.Type: GrantFiled: February 7, 2017Date of Patent: September 7, 2021Assignee: JFE STEEL CORPORATIONInventors: Yusuke Kimata, Yoshihiko Ono, Kenji Kawamura
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Patent number: 11008635Abstract: Provided is a high-strength cold-rolled steel sheet has a chemical composition containing, by mass %, C: 0.10% or more and 0.6% or less, Si: 1.0% or more and 3.0% or less, Mn: more than 2.5% and 10.0% or less, P: 0.05% or less, S: 0.02% or less, Al: 0.01% or more and 1.5% or less, N: 0.005% or less, Cu: 0.05% or more and 0.50% or less, and the balance being Fe and inevitable impurities, and a tensile strength of 1180 MPa or more, in which a steel sheet surface coverage of oxides mainly containing Si is 1% or less, a steel sheet surface coverage of iron-based oxides is 40% or less, CuS/CuB is 4.0 or less, and a tensile strength is 1180 MPa or more, where CuS denotes a Cu concentration in a surface layer of a steel sheet and CuB denotes a Cu concentration in base steel.Type: GrantFiled: February 15, 2017Date of Patent: May 18, 2021Assignee: JFE STEEL CORPORATIONInventors: Shimpei Yoshioka, Yoshihiko Ono, Yusuke Kimata, Hiroyuki Masuoka
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Patent number: 10431864Abstract: The present surface mount technology non-reciprocal circuit element (1) includes a ferromagnetic material (14) placed above a circuit board (11), and a conductor cover (13). The conductor cover (13) is composed of a main unit (12) located above the ferromagnetic material (14) and connecting members (17_1, 17_2, 17_3) for electrically connecting the main unit (12) with transmission lines (18_1, 18_2, 18_3) on the circuit board (11), respectively. The ferromagnetic material (14) and at least one of the connecting members (17_1, 17_2, 17_3) are formed so as to create, in at least one of gaps between the side surface of the ferromagnetic material (14) and each of the connecting members (17_1, 17_2, 17_3), a location where a clearance between a side surface of the ferromagnetic material (14) and the connecting member is a first clearance and a location where it is a second clearance different from the first clearance.Type: GrantFiled: June 14, 2016Date of Patent: October 1, 2019Assignee: NEC CORPORATIONInventor: Yusuke Kimata
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Publication number: 20190040482Abstract: A high-strength steel sheet having a tensile strength TS of 1320 MPa or more and excellent workability. The high-strength steel sheet has a chemical composition containing, by mass %, C: 0.20% or more and 0.40% or less, Si: 0.5% or more and 2.5% or less, Mn: more than 2.4% and 5.0% or less, P: 0.1% or less, S: 0.01% or less, Al: 0.01% or more and 0.5% or less, N: 0.010% or less, and Fe and inevitable impurities. A microstructure of the steel sheet includes, in terms of area fraction with respect to the whole steel sheet microstructure, lower bainite in an amount of 40% or more and less than 85%, martensite including tempered martensite in an amount of 5% or more and less than 40%, retained austenite in an amount of 10% or more and 30% or less, and polygonal ferrite in an amount of 10% or less (including 0%).Type: ApplicationFiled: February 7, 2017Publication date: February 7, 2019Applicant: JFE STEEL CORPORATIONInventors: Yusuke KIMATA, Yoshihiko ONO, Kenji KAWAMURA
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Publication number: 20190040490Abstract: Provided is a high-strength cold-rolled steel sheet has a chemical composition containing, by mass %, C: 0.10% or more and 0.6% or less, Si: 1.0% or more and 3.0% or less, Mn: more than 2.5% and 10.0% or less, P: 0.05% or less, S: 0.02% or less, Al: 0.01% or more and 1.5% or less, N: 0.005% or less, Cu: 0.05% or more and 0.50% or less, and the balance being Fe and inevitable impurities, and a tensile strength of 1180 MPa or more, in which a steel sheet surface coverage of oxides mainly containing Si is 1% or less, a steel sheet surface coverage of iron-based oxides is 40% or less, CuS/CuB is 4.0 or less, and a tensile strength is 1180 MPa or more, where CuS denotes a Cu concentration in a surface layer of a steel sheet and CUB denotes a Cu concentration in base steel.Type: ApplicationFiled: February 15, 2017Publication date: February 7, 2019Applicant: JFE Steel CorporationInventors: Shimpei Yoshioka, Yoshihiko Ono, Yusuke Kimata, Hiroyuki Masuoka
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Publication number: 20190040483Abstract: A high-strength steel sheet having a tensile strength (TS) of 1,320 MPa or more and good workability. The high-strength steel sheet has a specific component composition and a steel microstructure containing, on an area-percentage basis with respect to the entire steel microstructure, 40% or more and less than 85% of a lower bainite, 5% or more and less than 40% martensite including tempered martensite, 10% or more and 30% or less retained austenite, and 10% or less (including 0%) polygonal ferrite, the retained austenite having an average C content of 0.60% by mass or more. Additionally, a Mn segregation value at a surface of the steel sheet is 0.8% or less, the ratio R/t of a limit bending radius (R) to a thickness (t) of the steel sheet is 2.0 or less, and tensile strength×total elongation of the steel sheet is 15,000 MPa % or more.Type: ApplicationFiled: February 7, 2017Publication date: February 7, 2019Applicant: JFE STEEL CORPORATIONInventors: Yusuke KIMATA, Yoshihiko ONO, Kenji KAWAMURA
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Publication number: 20180183124Abstract: The present surface mount technology non-reciprocal circuit element (1) includes a ferromagnetic material (14) placed above a circuit board (11), and a conductor cover (13). The conductor cover (13) is composed of a main unit (12) located above the ferromagnetic material (14) and connecting members (17_1, 17_2, 17_3) for electrically connecting the main unit (12) with transmission lines (18_1, 18_2, 18_3) on the circuit board (11), respectively. The ferromagnetic material (14) and at least one of the connecting members (17_1, 17_2, 17_3) are formed so as to create, in at least one of gaps between the side surface of the ferromagnetic material (14) and each of the connecting members (17_1, 17_2, 17_3), a location where a clearance between a side surface of the ferromagnetic material (14) and the connecting member is a first clearance and a location where it is a second clearance different from the first clearance.Type: ApplicationFiled: June 14, 2016Publication date: June 28, 2018Applicant: NEC CorporationInventor: Yusuke KIMATA
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Patent number: 9920394Abstract: A bake-hardening galvanized steel sheet having a base steel sheet and a coating layer formed on the base steel sheet, the base steel sheet having a specified chemical composition and a metallographic structure including a ferrite phase and a cementite phase, in which an average ferrite grain diameter is controlled to be 10 ?m or more and 30 ?m or less, and in which the surface area of the interface between ferrite and cementite per unit volume is controlled to be 1.0/mm or more and 10.0/mm or less, a hydrogen concentration in steel of the base steel sheet is controlled to be less than 0.1 ppm, and a zinc coating weight per unit surface area of the steel sheet is controlled to be 40 g/m2 or more and 100 g/m2 or less.Type: GrantFiled: November 27, 2014Date of Patent: March 20, 2018Assignee: JFE STEEL CORPORATIONInventors: Kohei Hasegawa, Koichiro Fujita, Yusuke Kimata, Kozo Harada
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Patent number: 9661632Abstract: A transmission power adjustment value acquisition unit references a transmission power/adjustment value table to output a transmission power adjustment value for transmission power. A transmission frequency correction value acquisition unit references a transmission frequency/correction value table to output a transmission power correction value, from a center frequency of the position of an RB that is sent from a used transmission frequency calculation unit and that will actually be used. An adjustment value addition unit adds the adjustment value for the obtained transmission power and the transmission power correction value for the center value of the position of the RB that will actually be used, and calculates the transmission power setting. Since the transmission power correction value is obtained from the center frequency of the position of the RB actually transmitted, misalignment between the transmission power setting and the actual transmission power is reduced.Type: GrantFiled: January 13, 2012Date of Patent: May 23, 2017Assignee: NEC CORPORATIONInventor: Yusuke Kimata
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Publication number: 20160298207Abstract: Provided is a bake-hardening galvanized steel sheet which can preferably be used for, for example, automotive outer panels, which has a bake hardenability and corrosion resistance, which has good press formability, and with which a blister defect does not occur when a galvanizing treatment is performed, despite being manufactured at low cost by using low-carbon steel which can be comparatively easily manufactured. The steel sheet is a bake-hardening galvanized steel sheet having a base steel sheet and a coating layer formed on the base steel sheet, the base steel sheet having a specified chemical composition and a metallographic structure including a ferrite phase and a cementite phase, in which an average ferrite grain diameter is controlled to be 10 ?m or more and 30 ?m or less, and in which the surface area of the interface between ferrite and cementite per unit volume is controlled to be 1.0/mm or more and 10.Type: ApplicationFiled: November 27, 2014Publication date: October 13, 2016Applicant: JFE STEEL CORPORATIONInventors: Kohei HASEGAWA, Koichiro FUJITA, Yusuke KIMATA, Kozo HARADA
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Publication number: 20140011530Abstract: A transmission power adjustment value acquisition unit references a transmission power/adjustment value table to output a transmission power adjustment value for transmission power. A transmission frequency correction value acquisition unit references a transmission frequency/correction value table to output a transmission power correction value, from a center frequency of the position of an RB that is sent from a used transmission frequency calculation unit and that will actually be used. An adjustment value addition unit adds the adjustment value for the obtained transmission power and the transmission power correction value for the center value of the position of the RB that will actually be used, and calculates the transmission power setting. Since the transmission power correction value is obtained from the center frequency of the position of the RB actually transmitted, misalignment between the transmission power setting and the actual transmission power is reduced.Type: ApplicationFiled: January 13, 2012Publication date: January 9, 2014Applicant: NEC CASIO MOBILE COMMUNICATIONS, LTD.Inventor: Yusuke Kimata
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Patent number: 8050722Abstract: In a voltage supply control device, a voltage conversion circuit receives a voltage from a battery and generates a desired voltage. A switching control unit executes switching so as to supply a voltage to a power amplification circuit through the voltage conversion circuit when the voltage of the battery is equal to or more than a predetermined threshold value or supply the voltage to the power amplification circuit from the battery without intervention of the voltage conversion circuit when the voltage of the battery is less than the predetermined threshold value. The switching control unit uses different voltage threshold values for a plurality of transmission modes classified in accordance with the assumed values of appropriate voltages to be supplied to the power amplification circuit. A cellular phone terminal and a voltage supply control method are also disclosed.Type: GrantFiled: December 2, 2005Date of Patent: November 1, 2011Assignee: NEC CorporationInventor: Yusuke Kimata
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Patent number: 7373134Abstract: In response to the occurrence of an application event in a portable terminal with the communication function that has an application control CPU (ACPU) and a communication control CPU (CCPU), the operation of a control target unit, which is under control of a CCPU and which operates at an intermittent reception time, is detected. During the operation period of the control target unit, an ACPU sends a transmission request to the CCPU to start the CCPU. When the CCPU is in the sleep state in the intermittent reception cycle, the CCPU is not started by the ACPU.Type: GrantFiled: November 3, 2004Date of Patent: May 13, 2008Assignee: NEC CorporationInventor: Yusuke Kimata
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Patent number: 7327990Abstract: In a reception diversity system, a wireless apparatus includes an RF unit, analog signal processing unit, digital signal processing unit, and a control unit which controls the RF unit. The control unit operates only a predetermined system of systems while stopping the remaining systems for at least each intermittent operation period in intermittent reception operation of the RF unit, and stops all the systems in an intermittent stop period in the intermittent reception operation. The digital signal processing unit sets, in the RF unit, an initial reception gain estimated from an arbitrary past reception gain used in a past intermittent operation period as a first reception gain in a new system which is operated in accordance with arrival of a next intermittent operation period, thereby performing switching control of a plurality of systems which respectively demodulate received radio waves, and obtaining desired reception data. A control method for a reception diversity system is also disclosed.Type: GrantFiled: April 21, 2005Date of Patent: February 5, 2008Assignee: NEC CorporationInventor: Yusuke Kimata
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Patent number: 7167195Abstract: A camera 120 for imaging a call-sender, a monitor 110 for projecting the call-receiver who is the party on the other end of the phone and a transceiver 140 used for the call are provided. The transceiver 140 comprises a mike 14a for collecting the voice of the call-sender and a speaker 14b for outputting the voice of the call-receiver. A caption image (an arrow 150) is indicated on the monitor 110 for directing the caller's line of sight to the camera 120 and a light flashing system 130 is provided on the periphery of the camera 120.Type: GrantFiled: December 20, 2000Date of Patent: January 23, 2007Assignee: NEC CorporationInventors: Yusuke Kimata, Shuji Yamaguchi
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Patent number: 7069060Abstract: A compound information terminal, a mobile communications system and a control method thereof, which prevent the reception on a GPS terminal unit in operation from being affected by interference without turning off a 3GPP-compliant mobile telephone unit or disabling it for transmission. The compound information terminal comprises a user interface unit, a terminal control unit, a 3GPP-compliant mobile telephone unit and a GPS terminal unit. When the GPS terminal unit is activated, the terminal control unit switches the operation of the 3GPP-compliant mobile telephone unit to the compressed mode, in which the transmission is suspended at intervals of arbitrary period of time. Accordingly, the GPS terminal unit can be brought into action while the 3GPP-compliant mobile telephone unit suspends its transmission operation.Type: GrantFiled: August 22, 2002Date of Patent: June 27, 2006Assignee: NEC CorporationInventors: Yusuke Kimata, Masaki Ichihara
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Publication number: 20060128445Abstract: In a voltage supply control device, a voltage conversion circuit receives a voltage from a battery and generates a desired voltage. A switching control unit executes switching so as to supply a voltage to a power amplification circuit through the voltage conversion circuit when the voltage of the battery is equal to or more than a predetermined threshold value or supply the voltage to the power amplification circuit from the battery without intervention of the voltage conversion circuit when the voltage of the battery is less than the predetermined threshold value. The switching control unit uses different voltage threshold values for a plurality of transmission modes classified in accordance with the assumed values of appropriate voltages to be supplied to the power amplification circuit. A cellular phone terminal and a voltage supply control method are also disclosed.Type: ApplicationFiled: December 2, 2005Publication date: June 15, 2006Inventor: Yusuke Kimata