Patents by Inventor Takanori Okuda
Takanori Okuda 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: 20200307880Abstract: Disclosed is a film-wrapped type hot melt adhesive, comprising: a film made from a thermoplastic resin composition and a hot melt adhesive wrapped by the film, wherein the thermoplastic resin composition comprises an ethylene homopolymer, and a concavo-convex is formed on a surface of the film. The film-wrapped type hot melt adhesive has blocking resistance and thermal stability which are improved in a balanced manner.Type: ApplicationFiled: June 12, 2020Publication date: October 1, 2020Inventors: Takeshi Kiyohara, Shigekazu Saito, Takanori Okuda
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Patent number: 9816014Abstract: The present invention provides a hot melt adhesive suitable for use in disposable products, which can be applied at a high speed and provides excellent in adhesion in a wet state and low-temperature coating, with little odor. The hot melt adhesive for disposable products comprises: (A) a propylene homopolymer having a melting point of 100° C. or lower obtained by polymerizing propylene using a metallocene catalyst; and (B) a wax modified with carboxylic acid and/or carboxylic acid anhydride. The wet adhesion of the hot melt adhesive is improved when the wax is modified with maleic acid and/or maleic anhydride.Type: GrantFiled: March 14, 2014Date of Patent: November 14, 2017Assignee: HENKEL AG & CO. KGAAInventors: Masahiro Moriguchi, Shigekazu Saito, Kentarou Inoue, Takanori Okuda, Naohiro Maeda
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Publication number: 20140199907Abstract: The present invention provides a hot melt adhesive suitable for use in disposable products, which can be applied at a high speed and provides excellent in adhesion in a wet state and low-temperature coating, with little odor. The hot melt adhesive for disposable products comprises: (A) a propylene homopolymer having a melting point of 100° C. or lower obtained by polymerizing propylene using a metallocene catalyst; and (B) a wax modified with carboxylic acid and/or carboxylic acid anhydride. The wet adhesion of the hot melt adhesive is improved when the wax is modified with maleic acid and/or maleic anhydride.Type: ApplicationFiled: March 14, 2014Publication date: July 17, 2014Applicant: HENKEL AG & CO. KGAAInventors: Masahiro MORIGUCHI, Shigekazu SAITO, Kentarou INOUE, Takanori OKUDA, Naohiro MAEDA
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Patent number: 7304542Abstract: A feedback resistor of a feedback circuit included in a photo-receiving amplifier element is formed on an island region in which an electric potential is in a floating state. The island region is electrically isolated from an island region on which an element other than the feedback resistor is formed. This enables the response speed of the photo-receiving amplifier element to be increased without changing the process of the circuit or varying a resistance value of the feedback resistor in a first-stage amplifier unit.Type: GrantFiled: July 14, 2005Date of Patent: December 4, 2007Assignee: Sharp Kabushiki KaishaInventors: Motohiko Yamamoto, Takanori Okuda
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Patent number: 7263046Abstract: A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.Type: GrantFiled: September 19, 2006Date of Patent: August 28, 2007Assignee: Sharp Kabushiki KaishaInventors: Takanori Okuda, Takashi Yokoyama
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Publication number: 20070019517Abstract: A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.Type: ApplicationFiled: September 19, 2006Publication date: January 25, 2007Applicant: Sharp Kabushiki KaishaInventors: Takanori Okuda, Takashi Yokoyama
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Patent number: 7133346Abstract: A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.Type: GrantFiled: November 15, 2002Date of Patent: November 7, 2006Assignee: Sharp Kabushiki KaishaInventors: Takanori Okuda, Takashi Yokoyama
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Patent number: 7002881Abstract: The object of the invention is to provide a light receiving amplification element applicable to an optical pickup apparatus comprising a semiconductor two-wavelength laser element and one condensing lens. The light receiving amplification element is provided with a plurality of light receiving portions corresponding to different wavelengths, a plurality of trans-impedance type amplifiers connected to the light receiving portions according to the different wavelengths and adaptable to the different wavelengths and switching portion for switching output from the trans-impedance type amplifier according to each of the wavelengths.Type: GrantFiled: June 12, 2003Date of Patent: February 21, 2006Assignee: Sharp Kabushiki KaishaInventors: Takanori Okuda, Masaya Ohnishi
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Publication number: 20060011815Abstract: A feedback resistor of a feedback circuit included in a photo-receiving amplifier element is formed on an island region in which an electric potential is in a floating state. The island region is electrically isolated from an island region on which an element other than the feedback resistor is formed. This enables the response speed of the photo-receiving amplifier element to be increased without changing the process of the circuit or varying a resistance value of the feedback resistor in a first-stage amplifier unit.Type: ApplicationFiled: July 14, 2005Publication date: January 19, 2006Inventors: Motohiko Yamamoto, Takanori Okuda
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Publication number: 20030231574Abstract: The object of the invention is to provide a light receiving amplification element applicable to an optical pickup apparatus comprising a semiconductor two-wavelength laser element and one condensing lens. The light receiving amplification element is provided with a plurality of light receiving portions corresponding to different wavelengths, a plurality of trans-impedance type amplifiers connected to the light receiving portions according to the different wavelengths and adaptable to the different wavelengths and switching portion for switching output from the trans-impedance type amplifier according to each of the wavelengths.Type: ApplicationFiled: June 12, 2003Publication date: December 18, 2003Inventors: Takanori Okuda, Masaya Ohnishi
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Publication number: 20030112727Abstract: A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.Type: ApplicationFiled: November 15, 2002Publication date: June 19, 2003Inventors: Takanori Okuda, Takashi Yokoyama
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Patent number: 6480311Abstract: In a peak-hold circuit, a hold capacitor captures the peak value of an input signal and a reset section carries out a resetting operation on the holding value of the hold capacitor when, upon switching inputs, it receives a reset signal. The reset section, upon receipt of the reset signal, improves the response speed of a peak-hold section by a predetermined time period. The reset section is provided with a constant current circuit and a switching circuit for respectively increasing a charging current and a discharging current of the peak-hold section.Type: GrantFiled: August 12, 1998Date of Patent: November 12, 2002Assignee: Sharp Kabushiki KaishaInventors: Takanori Okuda, Naruichi Yokogawa
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Patent number: 6147533Abstract: A data communication receiving element includes a photo-receiving element for receiving an external light signal and for converting the light signal to a current signal. It further includes an amplifier circuit for amplifying the current signal after converting the current signal to a voltage signal. A waveform shaping circuit is included for shaping an output voltage waveform from the amplifier circuit to a substantially square pulse. Finally, an integrator is included for converting the substantially square pulse to a non-square pulse. This is achieved by extending a rising time necessary for shifting the substantially square pulse from a low potential level to a high potential level, and by extending a falling time necessary for shifting the substantially square pulse from the high potential level to the low potential level. As such, deterioration of an S/N ratio is suppressed.Type: GrantFiled: August 18, 1998Date of Patent: November 14, 2000Assignee: Sharp Kabushiki KaishaInventors: Takanori Okuda, Naruichi Yokogawa, Takayuki Shimizu, Fumitaka Nakamura
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Patent number: 6137101Abstract: A light receiving amplifying device includes a light receiving device for outputting a light signal current which varies with a quantity of received light, a load resistor connected with the light receiving device in series, for generating a detected voltage which varies with the light signal current, and a low frequency current bypass circuit for preventing the detected voltage from being saturated when the detected voltage has a frequency in a low frequency band. The low frequency current bypass circuit is connected with the load resistor in parallel and has an input impedance varying with a frequency of the detected voltage. The device further includes a transimpedance amplifying circuit (inverting amplifying circuit) for transforming an impedance of the detected voltage, and a capacitor for coupling the low frequency current bypass circuit and the transimpedance amplifying circuit (inverting amplifying circuit).Type: GrantFiled: August 11, 1998Date of Patent: October 24, 2000Assignee: Sharp Kabushiki KaishaInventors: Naruichi Yokogawa, Takanori Okuda, Takayuki Shimizu