Patents by Inventor Yasushi Oikawa
Yasushi Oikawa 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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Patent number: 11703647Abstract: An optical fiber securing structure includes: an optical fiber including a coating, and a coating-removed section in which a partial section of the coating is removed from the optical fiber; a reinforcement member including main surfaces and a groove formed from one of the main surfaces toward an inside of the reinforcement member, where the groove has a pair of side walls and a bottom wall; and a resin member that secures the coating-removed section to the pair of side walls and the bottom wall. A bottom part of the groove that includes the bottom wall has a widthwise cross-sectional shape where the bottom wall constitutes a trapezoidal shape such that a distance between the pair of side walls becomes greater in a direction away from the bottom wall.Type: GrantFiled: September 14, 2020Date of Patent: July 18, 2023Assignee: Fujikura Ltd.Inventors: Ryokichi Matsumoto, Yoshitaka Nakamura, Naoyuki Sugiyama, Hiroto Nakazato, Yasushi Oikawa, Akari Takahashi
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Publication number: 20220269018Abstract: An optical fiber securing structure includes: an optical fiber including a coating, and a coating-removed section in which a partial section of the coating is removed from the optical fiber; a reinforcement member including main surfaces and a groove formed from one of the main surfaces toward an inside of the reinforcement member, where the groove has a pair of side walls and a bottom wall; and a resin member that secures the coating-removed section to the pair of side walls and the bottom wall. A bottom part of the groove that includes the bottom wall has a widthwise cross-sectional shape where the bottom wall constitutes a trapezoidal shape such that a distance between the pair of side walls becomes greater in a direction away from the bottom wall.Type: ApplicationFiled: September 14, 2020Publication date: August 25, 2022Applicant: FUJIKURA LTD.Inventors: Ryokichi Matsumoto, Yoshitaka Nakamura, Naoyuki Sugiyama, Hiroto Nakazato, Yasushi Oikawa, Akari Takahashi
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Publication number: 20190090768Abstract: A vital sign waveform display apparatus includes: an acquiring section configured to acquire vital sign waveform data representing a plurality of vital sign waveforms; a generating section configured to generate the plurality of vital sign waveforms, based on the acquired vital sign waveform data; and a display controller configured to display the generated vital sign waveforms side by side on a display screen. The display controller highlights a first vital sign waveform when the first vital sign waveform is selected from the vital sign waveforms displayed on the display screen, and then the display controller highlights the first vital sign waveform and a second vital sign waveform when the second vital sign waveform is selected from the vital sign waveforms displayed on the display screen.Type: ApplicationFiled: October 17, 2016Publication date: March 28, 2019Inventor: Yasushi OIKAWA
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Patent number: 9784800Abstract: An inspection circuit serves as a pseudo circuit of a flux gate-type magnetic element having an excitation coil and a detection coil and inspects a magnetic field detector that detects a magnetic field based on an output of the magnetic element when detecting an intensity of a stationary magnetic field applied to the magnetic element based on a time-resolved magnetic balance type. The magnetic field detector includes: an excitation signal generation unit, a detection signal comparison unit, a feedback signal conversion unit, a feedback signal adjustment unit, a data signal conversion unit, and an excitation signal adjustment unit.Type: GrantFiled: April 28, 2014Date of Patent: October 10, 2017Assignee: FUJIKURA LTD.Inventor: Yasushi Oikawa
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Publication number: 20160109533Abstract: An inspection circuit serves as a pseudo circuit of a flux gate-type magnetic element having an excitation coil and a detection coil and inspects a magnetic field detector that detects a magnetic field based on an output of the magnetic element when detecting an intensity of a stationary magnetic field applied to the magnetic element based on a time-resolved magnetic balance type. The magnetic field detector includes: an excitation signal generation unit, a detection signal comparison unit, a feedback signal conversion unit, a feedback signal adjustment unit, a data signal conversion unit, and an excitation signal adjustment unit.Type: ApplicationFiled: April 28, 2014Publication date: April 21, 2016Applicant: FUJIKURA LTD.Inventor: Yasushi OIKAWA
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Patent number: 9239365Abstract: A magnetic element control device of the present invention includes an excitation signal generation unit that generates an alternating signal, a feedback signal conversion unit that converts a time width between detection signals of a positive voltage and a negative voltage into voltage information, an adjustment signal generation unit that generates an offset signal that cancels an offset component which is superimposed on a data signal indicating a magnetic field intensity, and an excitation signal adjustment unit that generates an alternating current, a feedback current, and an offset current from the alternating signal, the feedback signal, and the offset signal, respectively, superimposes the feedback current and the offset current on the alternating current, and generates an excitation current which is applied to an exciting coil.Type: GrantFiled: December 3, 2014Date of Patent: January 19, 2016Assignee: FUJIKURA LTD.Inventor: Yasushi Oikawa
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Patent number: 9209794Abstract: A magnetic element control device of the present invention includes an excitation signal generation unit that generates an alternating signal, an excitation signal adjustment unit that generates an alternating voltage signal from the alternating signal, and generates an excitation signal which is applied to an exciting coil on the basis of the alternating voltage signal, a detection signal comparison unit that detects a detection signal of a positive voltage or a negative voltage which is generated by an induced electromotive force when a current direction of the excitation signal switches, and a feedback signal adjustment unit that generates a feedback signal for applying a magnetic field, cancelling a stationary magnetic field which is applied to a magnetic element from voltage information, to a feedback coil.Type: GrantFiled: December 3, 2014Date of Patent: December 8, 2015Assignee: FUJIKURA LTD.Inventor: Yasushi Oikawa
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Patent number: 9157969Abstract: A magnetic element control device controls a magnetic element during detection of an intensity of a stationary magnetic field by a time-resolved magnetic balance system where the magnetic field is applied to a flux-gate magnetic element that is constituted of an excitation coil and a detecting coil. The magnetic element control device includes: an excitation signal generator; an excitation signal adjuster; a detection signal comparator; a feedback signal converter; a feedback signal adjuster; and a data signal converter. The excitation signal adjuster superimposes a feedback signal on an alternating voltage signal and thereby generates an excitation signal, and applies the generated excitation signal to the excitation coil.Type: GrantFiled: November 13, 2014Date of Patent: October 13, 2015Assignee: FUJIKURA LTD.Inventor: Yasushi Oikawa
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Publication number: 20150085419Abstract: A magnetic element control device of the present invention includes an excitation signal generation unit that generates an alternating signal, an excitation signal adjustment unit that generates an alternating voltage signal from the alternating signal, and generates an excitation signal which is applied to an exciting coil on the basis of the alternating voltage signal, a detection signal comparison unit that detects a detection signal of a positive voltage or a negative voltage which is generated by an induced electromotive force when a current direction of the excitation signal switches, and a feedback signal adjustment unit that generates a feedback signal for applying a magnetic field, cancelling a stationary magnetic field which is applied to a magnetic element from voltage information, to a feedback coil.Type: ApplicationFiled: December 3, 2014Publication date: March 26, 2015Applicant: FUJIKURA LTD.Inventor: Yasushi OIKAWA
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Publication number: 20150077101Abstract: A magnetic element control device of the present invention includes an excitation signal generation unit that generates an alternating signal, a feedback signal conversion unit that converts a time width between detection signals of a positive voltage and a negative voltage into voltage information, an adjustment signal generation unit that generates an offset signal that cancels an offset component which is superimposed on a data signal indicating a magnetic field intensity, and an excitation signal adjustment unit that generates an alternating current, a feedback current, and an offset current from the alternating signal, the feedback signal, and the offset signal, respectively, superimposes the feedback current and the offset current on the alternating current, and generates an excitation current which is applied to an exciting coil.Type: ApplicationFiled: December 3, 2014Publication date: March 19, 2015Applicant: FUJIKURA LTD.Inventor: Yasushi OIKAWA
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Publication number: 20150070010Abstract: A magnetic element control device controls a magnetic element during detection of an intensity of a stationary magnetic field by a time-resolved magnetic balance system where the magnetic field is applied to a flux-gate magnetic element that is constituted of an excitation coil and a detecting coil. The magnetic element control device includes: an excitation signal generator; an excitation signal adjuster; a detection signal comparator; a feedback signal converter; a feedback signal adjuster; and a data signal converter. The excitation signal adjuster superimposes a feedback signal on an alternating voltage signal and thereby generates an excitation signal, and applies the generated excitation signal to the excitation coil.Type: ApplicationFiled: November 13, 2014Publication date: March 12, 2015Applicant: FUJIKURA LTD.Inventor: Yasushi OIKAWA
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Publication number: 20140363161Abstract: An optical signal switching device includes: first through third input ports; first through third output ports; first through third optical splitters: first through third optical couplers; first through third short wavelength pass filters respectively configured to pass the first wavelength band; and first through third long wavelength pass filters respectively configured to pass the second wavelength band. Each of the optical splitters splits a WDM optical signal input through a corresponding input port to be guided to a corresponding short wavelength pass filter and a corresponding long wavelength pass filter. Each of the optical couplers combines an output optical signal of a corresponding short wavelength pass filter and an output signal of a corresponding long wavelength pass filter to be guided to a corresponding output port.Type: ApplicationFiled: August 21, 2014Publication date: December 11, 2014Inventors: YASUSHI OIKAWA, Kenji Ota
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Publication number: 20100239260Abstract: An optical transmission apparatus and method thereof is provided. The optical transmission apparatus includes transmission units configured to transmit lights having different wavelengths, a multiplexing unit configured to multiplex lights transmitted from the transmission units, and a controller configured to control wavelengths of the lights, where the controller includes a wavelength spacing processing unit that controls a spacing between the wavelengths on the basis of reception state information of an apparatus that has received the multiplexed light.Type: ApplicationFiled: March 17, 2010Publication date: September 23, 2010Applicant: FUJITSU LIMITEDInventors: Yasushi OIKAWA, Akira Sugiyama, Izumi Yokota
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Patent number: 6768202Abstract: Disclosed is a semiconductor device including a semiconductor substrate, an interlayer insulating film formed on one main surface of the semiconductor substrate and having a concave portion, a liner film formed on the inner surface of the concave portion, a wiring layer formed inside the concave portion with the liner film interposed therebetween, and an agglomeration suppressing material contained in the wiring layer for suppressing agglomeration of the material constituting the wiring layer. The agglomeration suppressing material is selected from the group consisting of O, N, Nb, Ta, Ti, W and C.Type: GrantFiled: July 3, 2002Date of Patent: July 27, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Yasushi Oikawa, Junichi Wada, Tomio Katata
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Patent number: 6720253Abstract: A semiconductor device is constituted by embedding an Al wiring layer in a second object formed on a interlayer-insulating film on one principal plane of a semiconductor substrate and connecting with an Al wiring formed on the substrate and at least, an Nb liner film and NbAl alloy film are formed between the second object and the Al wiring layer.Type: GrantFiled: September 4, 2001Date of Patent: April 13, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Junichi Wada, Yasushi Oikawa, Tomio Katata
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Publication number: 20020192946Abstract: Disclosed is a semiconductor device comprising a semiconductor substrate, an interlayer insulating film formed on one main surface of the semiconductor substrate and having a concave portion, a liner film formed on the inner surface of the concave portion, a wiring layer formed inside the concave portion with the liner film interposed therebetween, and an agglomeration suppressing material contained in the wiring layer for suppressing agglomeration of the material constituting the wiring layer. The agglomeration suppressing material is selected from the group consisting of O, N, Nb, Ta, Ti, W and C.Type: ApplicationFiled: July 3, 2002Publication date: December 19, 2002Applicant: Kabushiki Kaisha ToshibaInventors: Yasushi Oikawa, Junichi Wada, Tomio Katata
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Patent number: 6436813Abstract: Disclosed is a semiconductor device including a semiconductor substrate, an interlayer insulating film formed on one main surface of the semiconductor substrate and having a concave portion, a liner film formed on the inner surface of the concave portion, a wiring layer formed inside the concave portion with the liner film interposed therebetween, and an agglomeration suppressing material contained in the wiring layer for suppressing agglomeration of the material constituting the wiring layer. The agglomeration suppressing material is selected from the group consisting of O, N, Nb, Ta, Ti, W and C.Type: GrantFiled: March 21, 2000Date of Patent: August 20, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Yasushi Oikawa, Junichi Wada, Tomio Katata
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Publication number: 20020033539Abstract: A semiconductor device is constituted by embedding an Al wiring layer in a second object formed on a interlayer-insulating film on one principal plane of a semiconductor substrate and connecting with an Al wiring formed on the substrate and at least, an Nb liner film and NbAl alloy film are formed between the second object and the Al wiring layer.Type: ApplicationFiled: September 4, 2001Publication date: March 21, 2002Applicant: Kabushiki Kaisha ToshibaInventors: Junichi Wada, Yasushi Oikawa, Tomio Katata
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Patent number: 6307267Abstract: A semiconductor device is constituted by embedding an Al wiring layer in a second object formed on an interlayer-insulating film on one principal plane of a semiconductor substrate and connecting with an Al wiring formed on the substrate and at least, an Nb liner film and NbAl alloy film are formed between the second object and the Al wiring layer.Type: GrantFiled: December 22, 1998Date of Patent: October 23, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Junichi Wada, Yasushi Oikawa, Tomio Katata