Patents by Inventor Toshiaki Yokota
Toshiaki Yokota 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: 9337796Abstract: To suppress changes in capacitance due to displacement between electrodes opposing each other across a dielectric layer, thereby allowing stable manufacturing of a capacitance device having a desired capacitance. A capacitance device is of a configuration including a dielectric layer, a first electrode formed on a predetermined surface of the dielectric layer, and a second electrode formed on a surface on the opposite side of the dielectric layer from the predetermined surface. The forms of the first and second electrodes are set so that even in the event that the first electrode is relatively displaced regarding position in a predetermined direction as to the second electrode, the area of the opposing-electrode region between the first electrode and to the second electrode is unchanged.Type: GrantFiled: April 11, 2014Date of Patent: May 10, 2016Assignee: DEXERIALS CORPORATIONInventors: Masayoshi Kanno, Toshiaki Yokota, Kazutaka Habu, Makoto Watanabe, Noritaka Sato
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Patent number: 9082545Abstract: An antenna device, capable of stable communications without increasing a space of the entire device by keeping a resonance frequency substantially constant even if the temperature changes, includes: an antenna circuit having an antenna coil with an electrically connected capacitor; the coil receiving a magnetic field transmitted from a reader/writer at a predetermined oscillation frequency; the circuit becoming communicable when inductively coupled to the reader/writer; and a magnetic sheet formed at a position superposed on the coil to change its inductance, wherein the coil has a temperature characteristic in which the inductance is changed with a temperature change, and the sheet has a temperature characteristic of changing the inductance to achieve a characteristic inverse to the inductance change with the temperature change in a predetermined use temperature range, and substantially matching a resonance frequency of the circuit with the oscillation frequency in the use temperature region.Type: GrantFiled: November 16, 2011Date of Patent: July 14, 2015Assignee: DEXERIALS CORPORATIONInventors: Satoru Sugita, Toshiaki Yokota, Yoshimi Takahashi, Katsuhisa Orihara
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Publication number: 20140323044Abstract: A contactless receiver is provided with a receiving section and a rectification section. The receiving section has a resonant circuit including a resonant capacitor having a variable capacitance element formed with a ferroelectric material, a capacitance of the variable capacitance element changing according to a received voltage at a predetermined frequency, and a resonance coil connected to the resonant capacitor. The rectification section converts an alternating current voltage output from the receiving section into a direct current voltage.Type: ApplicationFiled: July 11, 2014Publication date: October 30, 2014Inventors: Masayoshi KANNO, Kazutaka HABU, Makoto WATANABE, Toshiaki YOKOTA
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Patent number: 8862306Abstract: A method for controlling movement of travelling carriers includes performing data communication between front and rear adjacent travelling carriers, an on-board communication device provided to the travelling carrier and performing data communication with a ground-based communication device, and the ground-based communication device sending a movement permission signal at one end of a work area to the on-board communication device of a passing travelling carrier; and transmitting the movement permission signal to all of the travelling carriers within the work area from the ground-based communication device via the on-board communication device and the data communication means.Type: GrantFiled: June 20, 2013Date of Patent: October 14, 2014Assignee: Daifuku Co., Ltd.Inventors: Toshiaki Yokota, Kazuhiko Miyoshi, Masatsugu Kamei, Atsunobu Iseki
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Publication number: 20140247097Abstract: To suppress changes in capacitance due to displacement between electrodes opposing each other across a dielectric layer, thereby allowing stable manufacturing of a capacitance device having a desired capacitance. The capacitance device according to the present invention is of a configuration including a dielectric layer (10), a first electrode (11) formed on a predetermined surface (10a) of the dielectric layer (10), and a second electrode (12) formed on a surface (10b) on the opposite side of the dielectric layer (10) from the predetermined surface (10a). The forms of the first and second electrodes (11, 12) are set so that even in the event that the first electrode (11) is relatively displaced regarding position in a predetermined direction as to the second electrode (12), the area of the opposing-electrode region between the first electrode (11) and to the second electrode (12) is unchanged.Type: ApplicationFiled: April 11, 2014Publication date: September 4, 2014Applicant: DEXERIALS CORPORATIONInventors: Masayoshi KANNO, Toshiaki YOKOTA, Kazutaka HABU, Makoto WATANABE, Noritaka SATO
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Patent number: 8825205Abstract: A method for controlling movement of travelling carriers includes providing, to a rear travelling carrier approaching a work area at a high speed, current location information corresponding to distances from a measurement starting point to the rear travelling carrier and a front travelling carrier, the rear travelling carrier calculating a following distance between the front and rear travelling carriers based on the current location information, and the rear travelling carrier performing deceleration control to the operating speed based on decremental changes of the following distance.Type: GrantFiled: June 20, 2013Date of Patent: September 2, 2014Assignee: Daifuku Co., Ltd.Inventors: Toshiaki Yokota, Kazuhiko Miyoshi, Masatsugu Kamei, Atsunobu Iseki
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Publication number: 20140212614Abstract: A wholly aromatic polyester being excellent in heat resistance and toughness and being capable of being produced in an ordinary polymerization device, which exhibits optical anisotropy when it is molten, containing the constitutional unit (I) derived from 4-hydroxybenzoic acid, the constitutional unit (II) derived from 6-hydroxy-2-naphthoic acid, the constitutional unit (III) derived from 1,4-phenylenedicarboxylic acid, the constitutional unit (IV) derived from 1,3-phenylenedicarboxylic acid and the constitutional unit (V) derived from 4,4?-dihydroxybiphenyl, containing the constitutional unit (I) in an amount of 35 to 75 mol %, the constitutional unit (II) in an amount of 2 to 8 mol %, the constitutional unit (III) in an amount of 4.5 to 30.5 mol %, the constitutional unit (IV) in an amount of 2 to 8 mol %, the constitutional unit (V) in an amount of 12.5 to 32.5 mol %, the total of constitutional units (II) and (IV) being in an amount of 4 to 10 mol %.Type: ApplicationFiled: March 28, 2012Publication date: July 31, 2014Applicant: Polyplastics Co., Ltd.Inventors: Toshiaki Yokota, Mineo Ohtake
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Patent number: 8781396Abstract: A contactless receiver is provided with a receiving section and a rectification section. The receiving section has a resonant circuit including a resonant capacitor having a variable capacitance element formed with a ferroelectric material, a capacitance of the variable capacitance element changing according to a received voltage at a predetermined frequency, and a resonance coil connected to the resonant capacitor. The rectification section converts an alternating current voltage output from the receiving section into a direct current voltage.Type: GrantFiled: August 24, 2009Date of Patent: July 15, 2014Assignee: Dexerials CorporationInventors: Masayoshi Kanno, Kazutaka Habu, Makoto Watanabe, Toshiaki Yokota
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Patent number: 8736401Abstract: To suppress changes in capacitance due to displacement between electrodes opposing each other across a dielectric layer, thereby allowing stable manufacturing of a capacitance device having a desired capacitance. The capacitance device according to the present invention is of a configuration including a dielectric layer (10), a first electrode (11) formed on a predetermined surface (10a) of the dielectric layer (10), and a second electrode (12) formed on a surface (10b) on the opposite side of the dielectric layer (10) from the predetermined surface (10a). The forms of the first and second electrodes (11, 12) are set so that even in the event that the first electrode (11) is relatively displaced regarding position in a predetermined direction as to the second electrode (12), the area of the opposing-electrode region between the first electrode (11) and to the second electrode (12) is unchanged.Type: GrantFiled: September 24, 2009Date of Patent: May 27, 2014Assignee: Dexerials CorporationInventors: Masayoshi Kanno, Toshiaki Yokota, Kazutaka Habu, Makoto Watanabe, Noritaka Sato
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Publication number: 20130282223Abstract: A method for controlling movement of travelling carriers includes performing data communication between front and rear adjacent travelling carriers, an on-board communication device provided to the travelling carrier and performing data communication with a ground-based communication device, and the ground-based communication device sending a movement permission signal at one end of a work area to the on-board communication device of a passing travelling carrier; and transmitting the movement permission signal to all of the travelling carriers within the work area from the ground-based communication device via the on-board communication device and the data communication means.Type: ApplicationFiled: June 20, 2013Publication date: October 24, 2013Inventors: Toshiaki Yokota, Kazuhiko Miyoshi, Masatsugu Kamei, Atsunobu Iseki
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Publication number: 20130282168Abstract: A method for controlling movement of travelling carriers includes providing, to a rear travelling carrier approaching a work area at a high speed, current location information corresponding to distances from a measurement starting point to the rear travelling carrier and a front travelling carrier, the rear travelling carrier calculating a following distance between the front and rear travelling carriers based on the current location information, and the rear travelling carrier performing deceleration control to the operating speed based on decremental changes of the following distance.Type: ApplicationFiled: June 20, 2013Publication date: October 24, 2013Inventors: Toshiaki Yokota, Kazuhiko Miyoshi, Masatsugu Kamei, Atsunobu Iseki
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Publication number: 20130169398Abstract: An antenna device, capable of stable communications without increasing a space of the entire device by keeping a resonance frequency substantially constant even if the temperature changes, includes: an antenna circuit having an antenna coil with an electrically connected capacitor; the coil receiving a magnetic field transmitted from a reader/writer at a predetermined oscillation frequency; the circuit becoming communicable when inductively coupled to the reader/writer; and a magnetic sheet formed at a position superposed on the coil to change its inductance, wherein the coil has a temperature characteristic in which the inductance is changed with a temperature change, and the sheet has a temperature characteristic of changing the inductance to achieve a characteristic inverse to the inductance change with the temperature change in a predetermined use temperature range, and substantially matching a resonance frequency of the circuit with the oscillation frequency in the use temperature region.Type: ApplicationFiled: November 16, 2011Publication date: July 4, 2013Applicant: DEXERIALS CORPORATIONInventors: Satoru Sugita, Toshiaki Yokota, Yoshimi Takahashi, Katsuhisa Orihara
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Patent number: 8385045Abstract: A variable capacitor and a control method thereof capable of responding to applications of electronic apparatuses including various electronic devices and communication mobile devices. The variable capacitor includes a pair of electrodes formed so as to sandwich a ferroelectric material layer, in which polarization processing higher than a coercive field in hysteresis characteristics of polarization has been performed to the ferroelectric material layer, and the capacitance can be varied in accordance with a control voltage applied to the electrodes.Type: GrantFiled: February 12, 2009Date of Patent: February 26, 2013Assignee: Sony CorporationInventors: Kazutaka Habu, Masayoshi Kanno, Toshiaki Yokota, Makoto Watanabe
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Patent number: 8243417Abstract: Disclosed is a variable capacitor that includes signal electrodes configured to sandwich a dielectric layer so as to generate a signal electric field, and control electrodes configured to sandwich the dielectric layer so as to generate a control electric field in a direction intersecting with the signal electric field generated between the signal electrodes.Type: GrantFiled: April 21, 2009Date of Patent: August 14, 2012Assignee: Sony CorporationInventors: Masayoshi Kanno, Kazutaka Habu, Toshiaki Yokota, Makoto Watanabe
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Publication number: 20110163827Abstract: To suppress changes in capacitance due to displacement between electrodes opposing each other across a dielectric layer, thereby allowing stable manufacturing of a capacitance device having a desired capacitance. The capacitance device according to the present invention is of a configuration including a dielectric layer (10), a first electrode (11) formed on a predetermined surface (10a) of the dielectric layer (10), and a second electrode (12) formed on a surface (10b) on the opposite side of the dielectric layer (10) from the predetermined surface (10a). The forms of the first and second electrodes (11, 12) are set so that even in the event that the first electrode (11) is relatively displaced regarding position in a predetermined direction as to the second electrode (12), the area of the opposing-electrode region between the first electrode (11) and to the second electrode (12) is unchanged.Type: ApplicationFiled: September 24, 2009Publication date: July 7, 2011Applicant: SONY CORPORATIONInventors: Masayoshi Kanno, Toshiaki Yokota, Kazutaka Habu, Makoto Watanabe, Noritaka Sato
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Publication number: 20100328839Abstract: A variable-capacitance element the capacitance value of which can be freely set to a desired value corresponding to a write voltage, and, once set, is maintained also after the write voltage is removed. The invention also provides a method for adjusting a variable-capacitance element, a variable-capacitance device and an electronic apparatus. According to the invention, a variable-capacitance element 100 includes a pair of electrodes 101 and 102 formed with a ferroelectric material layer 103 in between. The variable-capacitance element is adjusted by the steps of: maximizing or minimizing the sum of electric dipole moments of the ferroelectric material layer 103; and writing a desired capacitance to the variable-capacitance element 100 by applying a desired write voltage V between the electrodes 101 and 102 of the variable-capacitance element 100 the sum of electric dipole moments of the ferroelectric material layer 103 of which has been maximized or minimized.Type: ApplicationFiled: February 12, 2009Publication date: December 30, 2010Applicant: SONY CORPORATIONInventors: Masayoshi Kanno, Kazutaka Habu, Makoto Watanabe, Toshiaki Yokota
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Publication number: 20100321857Abstract: The present invention provides a variable capacitor and a control method thereof capable of responding to applications of electronic apparatus including various electronic devices and communication mobile devices. The electronic device and the communication mobile device including the variable capacitor are provided. A variable capacitor according to the invention includes a pair of electrodes formed so as to sandwich a ferroelectric material layer, in which polarization processing higher than a coercive field in hysteresis characteristics of polarization has been performed to the ferroelectric material layer, and the capacitance can be varied in accordance with a control voltage applied to the electrodes.Type: ApplicationFiled: February 12, 2009Publication date: December 23, 2010Applicant: SONY CORPORATIONInventors: Kazutaka Habu, Masayoshi Kanno, Toshiaki Yokota, Makoto Watanabe
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Publication number: 20100056098Abstract: A contactless receiver is provided with a receiving section and a rectification section. The receiving section has a resonant circuit including a resonant capacitor having a variable capacitance element formed with a ferroelectric material, a capacitance of the variable capacitance element changing according to a received voltage at a predetermined frequency, and a resonance coil connected to the resonant capacitor. The rectification section converts an alternating current voltage output from the receiving section into a direct current voltage.Type: ApplicationFiled: August 24, 2009Publication date: March 4, 2010Applicant: Sony CorporationInventors: Masayoshi Kanno, Kazutaka Habu, Makoto Watanabe, Toshiaki Yokota
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Publication number: 20090257167Abstract: Disclosed is a variable capacitor that includes signal electrodes configured to sandwich a dielectric layer so as to generate a signal electric field, and control electrodes configured to sandwich the dielectric layer so as to generate a control electric field in a direction intersecting with the signal electric field generated between the signal electrodes.Type: ApplicationFiled: April 21, 2009Publication date: October 15, 2009Applicant: Sony CorporationInventors: Masayoshi Kanno, Kazutaka Habu, Toshiaki Yokota, Makoto Watanabe
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Publication number: 20090146898Abstract: There are provided an antenna module-use magnetic core member, an antenna module and a portable information terminal provided with the same, capable of improving a communication distance without increasing a module thickness. In an antenna module (1) in which a sheet-formed magnetic core member (4) is stacked on an antenna substrate (2) on which a looped antenna is formed, one having a performance index, expressed by ??×Q, of 300 or higher when Q is a reciprocal of a loss factor (tan ?=??/??) expressed by a real part ?? and an imaginary part ?? of a complex permeability at an applied frequency is used as the magnetic core member (4).Type: ApplicationFiled: April 25, 2005Publication date: June 11, 2009Applicant: SONY CORPORATIONInventors: Hiraku Akiho, Isao Takahashi, Toshiaki Sugawara, Toshiaki Yokota