Patents by Inventor Kentaro Uchiyama
Kentaro Uchiyama 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: 20240097197Abstract: A non-aqueous rechargeable battery includes an electrode body in which a positive plate and a negative electrode plate are stacked in a stacking direction with a separator arranged in between. The positive electrode plate includes a positive electrode substrate, and a positive electrode mixture layer and an insulating layer arranged on each of two opposite surfaces of the positive electrode substrate. The positive electrode substrate includes a positive electrode uncoated portion. The electrode body includes a positive electrode current collector portion in which layers of the positive electrode uncoated portion are stacked in the stacking direction. A first insulating layer on a first surface of the positive electrode substrate, facing a center of the positive electrode current collector portion in the stacking direction, has a thickness that is greater than that of a second insulating layer on a second surface of the positive electrode substrate opposite to the first surface.Type: ApplicationFiled: September 18, 2023Publication date: March 21, 2024Applicants: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Kazutaka YOSHIKAWA, Shotaro DEGUCHI, Ryotaro SAKAI, Shota UCHIYAMA, Nobuaki KOIWA, Kentaro SUZUKI
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Patent number: 9194820Abstract: An inspection method for a welded joint formed between a pair of base metals (10, 20) with a groove part (12, 22) and an abutment face (14, 24) being formed on a joint surface Wc between the pair of base metals. The method includes the steps of: forming a recessed groove (32) opening to a surface of the base metals in advance at one end of the abutment face; irradiating the joint surface Wc with an X-ray generator (34) placed on a groove part formation side (an exterior space O side) toward the joint surface Wc after at least one pass P1 of build-up welding is performed on the groove parts (12, 22); and determining the presence or absence of incomplete penetration in the welded joint part W based on an image formed on a photosensitive film (42) by radiation penetrating the joint surface Wc.Type: GrantFiled: March 15, 2013Date of Patent: November 24, 2015Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Shin Nishimoto, Makoto Tanaka, Kenji Kawasaki, Hiroyuki Endo, Kentaro Uchiyama, Yoshinobu Koori
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Publication number: 20140153693Abstract: An inspection method for a welded joint formed between a pair of base metals 10, 20 with a groove part 12, 22 and an abutment face 14, 24 being formed on a joint surface Wc between the pair of base metals 10, 20, includes steps of: forming a recessed groove 32 opening to a surface of the base metal 10, 20 in advance at one end of the abutment face; irradiating the joint surface Wc from an X-ray generator 34 placed on a groove part formation side (an exterior space O side) toward the joint surface Wc after at least one pass P1 of build-up welding is performed on the groove parts 12, 22; and determining presence or absence of incomplete penetration in the welded joint part W based on an image formed on a photosensitive film 42 by radiation penetrating the joint surface Wc.Type: ApplicationFiled: March 15, 2013Publication date: June 5, 2014Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shin NISHIMOTO, Makoto TANAKA, Kenji KAWASAKI, Hiroyuki ENDO, Kentaro UCHIYAMA, Yoshinobu KOORI
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Patent number: 7200328Abstract: A monitoring system includes first and second evaluation sections for obtaining an averaged Q-factor parameter and a waveform distortion parameter from an optical signal amplitude histogram collected from optical signals under measurement. The monitoring system further includes a third evaluation section for determining both averaged Q-factor parameter and waveform distortion parameter, and for making a decision as to whether the main factor of the optical signal quality degradation is waveform distortion or not by comparing the averaged Q-factor parameter and waveform distortion parameter with their initial values or initial characteristics which are obtained when no optical signal quality degradation is present.Type: GrantFiled: June 19, 2002Date of Patent: April 3, 2007Assignee: Nippon Telegraph and Telephone CorporationInventors: Ippei Shake, Hidehiko Takara, Kentaro Uchiyama
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Patent number: 7024122Abstract: In an ultrahigh-speed clock extraction circuit wherein a local pulse generating light source 22 for generating a local optical pulse stream synchronized in bit phase with an input optical signal pulse stream is placed in a phase-locked loop, when repetition frequencies of the input optical signal pulse stream and the local optical pulse stream bear a particular relationship, a frequency demultiplier 32 and multipliers 43 and 52 are set so that the frequency of a modulation signal for an optical modulator 41 and a frequency which is a natural-number multiple of the modulation signal frequency, and the frequency of a down-converted version of an optical pulse stream output from a photodetector 42 differ from each other.Type: GrantFiled: November 1, 2002Date of Patent: April 4, 2006Assignee: Nippon Telegraph and Telephone CorporationInventors: Kentaro Uchiyama, Hidehiko Takara, Eiichi Yamada, Etsu Hashimoto, Toshio Morioka
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Patent number: 6587242Abstract: It is the object of the present invention to provide a transmission system that transmits a control signal corresponding to the overhead accommodating time division multiplexing information at a frequency that is the same (or nearly the same) as that of the main signal. In order to attain this object, an optical transmitter broadens in a time range the optical waveform of the OTDM signal having a wavelength &lgr;0 and the control light having a wavelength &lgr;1(≈&lgr;0), and multiplexes the signal light having an optical peak intensity set low compared to the OTDM signal peak intensity and sending this to an optical transmission fiber.Type: GrantFiled: October 22, 1999Date of Patent: July 1, 2003Assignee: Nippon Telegraph and Telephone CorporationInventors: Ippei Shake, Hidehiko Takara, Yoshiaki Yamabayashi, Osamu Kamatani, Koji Nonaka, Kentaro Uchiyama
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Publication number: 20030117196Abstract: In an ultrahigh-speed clock extraction circuit wherein a local pulse generating light source 22 for generating a local optical pulse stream synchronized in bit phase with an input optical signal pulse stream is placed in a phase-locked loop, when repetition frequencies of the input optical signal pulse stream and the local optical pulse stream bear a particular relationship, a frequency demultiplier 32 and multipliers 43 and 52 are set so that the frequency of a modulation signal for an optical modulator 41 and a frequency which is a natural-number multiple of the modulation signal frequency, and the frequency of a down-converted version of an optical pulse stream output from a photodetector 42 differ from each other.Type: ApplicationFiled: November 1, 2002Publication date: June 26, 2003Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kentaro Uchiyama, Hidehiko Takara, Eiichi Yamada, Etsu Hashimoto, Toshio Morioka
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Patent number: 6560007Abstract: A phase-lock loop is formed by a voltage-controlled oscillator, a local optical pulse source, an optical branching device for branching the locally generated optical pulse stream from the local optical pulse source, a harmonic component local generation part for locally generating a harmonic component electrical signal from the one of two branched locally generated optical pulse streams, and a phase comparison part for comparing the phases of the locally generated harmonic component electrical signal and an incoming signal component electrical signal generated from an incoming optical signal pulse stream and for supplying the voltage-controlled oscillator with a control voltage corresponding to the phase difference between the two input electrical signals. The other branched output from the optical branching device is output as a locally generated optical pulse stream bit-phase synchronized with the incoming optical signal pulse stream.Type: GrantFiled: January 18, 2001Date of Patent: May 6, 2003Assignee: Nippon Telegraph and Telephone CorporationInventors: Kentaro Uchiyama, Etsu Hashimoto, Wataru Imajuku
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Publication number: 20030011837Abstract: A monitoring system includes first and second evaluation sections for obtaining an averaged Q-factor parameter and a waveform distortion parameter from an optical signal amplitude histogram collected from optical signals under measurement. The monitoring system further includes a third evaluation section for determining both averaged Q-factor parameter and waveform distortion parameter, and for making a decision as to whether the main factor of the optical signal quality degradation is waveform distortion or not by comparing the averaged Q-factor parameter and waveform distortion parameter with their initial values or initial characteristics which are obtained when no optical signal quality degradation is present.Type: ApplicationFiled: June 19, 2002Publication date: January 16, 2003Applicant: Nippon Telegraph and Telephone CorporationInventors: Ippei Shake, Hidehiko Takara, Kentaro Uchiyama
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Publication number: 20020027692Abstract: A phase-lock loop (PLL) is formed by a voltage-controlled oscillator (51), a local optical pulse source (2), an optical branching device (12) for branching the locally generated optical pulse stream from the local optical pulse source (52), a harmonic component local generation part (30) for locally generating harmonic component electrical signal from the one of two branched locally generated optical pulse streams, and a phase comparison part (40) for comparing the phases of the locally generated harmonic component electrical signal and an incoming signal component electrical signal generated from an incoming optical signal pulse stream and for supplying the voltage-controlled oscillator (51) with a control voltage corresponding to the phase difference between the two input electrical signal. The other branched output from the optical branching device (12) is output as a locally generated optical pulse stream bit-phase synchronized with the incoming optical signal pulse stream.Type: ApplicationFiled: January 18, 2001Publication date: March 7, 2002Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kentaro Uchiyama, Etsu Hashimoto, Wataru Imajuku
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Patent number: 6204944Abstract: An all-optical time-division demultiplexing circuit is designed to output all the channels of time-division multiplexed signal pulses to different output ports simultaneously. A pulse stream of time-division multiplexed signal pulses and linearly chirped control pulses synchronized with the signal channels are input into an optical Kerr medium. The optical Kerr medium provides locally cross-phase modulation to the control pulse, depending on the presence or absence of the signal pulses of each signal channel. And the optical Kerr medium modulates the power of the component frequencies &ugr;1, &ugr;2, . . . , &ugr;N of the control pulses in accordance with each of the signal channel, by inducing the optical frequency shift to compensate the control pulse chirp on the optical frequency axis. The Kerr medium outputs a power modulated control light, which is separated in a wavelength-division demultiplexing circuit into component frequencies &ugr;1, &ugr;2, . . .Type: GrantFiled: July 15, 1998Date of Patent: March 20, 2001Assignee: Nippon Telegraph and Telephone CorporationInventors: Kentaro Uchiyama, Satoki Kawanishi, Masatoshi Saruwatari
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Patent number: 5357359Abstract: An all-optical polarization independent optical time division multiplexer and demultiplexer which are stable as well as very fast, while being independent of the polarization state of the input optical signal pulses.Type: GrantFiled: August 11, 1993Date of Patent: October 18, 1994Assignee: Nippon Telegraph and Telephone CorporationInventors: Kentaro Uchiyama, Toshio Morioka, Masatoshi Saruwatari