Patents by Inventor Takumi Yamaga
Takumi Yamaga 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: 10918293Abstract: A magnetic measuring apparatus includes an inclination gantry including a mount surface and an inclined surface that is inclined with respect to the mount surface, a cryostat disposed on the inclined surface, a cryocooling system connected to the cryostat, a sensor tube connected to the cryostat and including a curved surface that does not curve in a predetermined direction and curves in a direction orthogonal to the predetermined direction such that a center of the curved surface protrudes with respect to side edges of the curved surface, and a magnetic sensor that measures biomagnetism and is housed in the sensor tube such that a sensor surface of the magnetic sensor faces the curved surface. The sensor surface is inclined with respect to the mount surface in a direction that is the same as a direction in which the inclined surface is inclined.Type: GrantFiled: August 29, 2018Date of Patent: February 16, 2021Assignees: Ricoh Company, Ltd., NATIONAL UNIVERSITY CORPORATION TOKYO MEDICAL AND DENTAL UNIVERSITYInventors: Takumi Yamaga, Hiroshi Deguchi, Koji Yamaguchi, Takafumi Ishibe, Shunichi Matsumoto, Shigenori Kawabata, Shuta Ushio
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Patent number: 10722701Abstract: A nerve stimulation apparatus is provided. The nerve stimulation apparatus detects nerve activities from a body surface and applies stimulation. The nerve stimulation apparatus includes a stimulation apparatus with multiple electrodes which are arranged on skin and a current supply unit which supplies a current to the electrodes, which stimulation apparatus provides the current to a living body percutaneously to stimulate a target nerve; a measurement apparatus which measures activities of muscles governed by the nerve according to the stimulation from the stimulation apparatus; and an information processing apparatus which determines, based on a measurement result of the nerve activities obtained from the measurement apparatus, which electrode is capable of providing the target nerve activities equal to or greater than a desired value.Type: GrantFiled: November 7, 2016Date of Patent: July 28, 2020Assignees: Ricoh Company, Ltd., National University Corporation Tokyo Medical and Dental UniversityInventors: Takafumi Ishibe, Shigenori Kawabata, Takumi Yamaga, Hiroshi Deguchi, Koji Yamaguchi, Shunichi Matsumoto
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Publication number: 20190059758Abstract: A magnetic measuring apparatus includes an inclination gantry including a mount surface and an inclined surface that is inclined with respect to the mount surface, a cryostat disposed on the inclined surface, a cryocooling system connected to the cryostat, a sensor tube connected to the cryostat and including a curved surface that does not curve in a predetermined direction and curves in a direction orthogonal to the predetermined direction such that a center of the curved surface protrudes with respect to side edges of the curved surface, and a magnetic sensor that measures biomagnetism and is housed in the sensor tube such that a sensor surface of the magnetic sensor faces the curved surface. The sensor surface is inclined with respect to the mount surface in a direction that is the same as a direction in which the inclined surface is inclined.Type: ApplicationFiled: August 29, 2018Publication date: February 28, 2019Applicants: Ricoh Company, Ltd., National University Corporation Tokyo Medical and Dental UniversityInventors: Takumi YAMAGA, Hiroshi DEGUCHI, Koji YAMAGUCHI, Takafumi ISHIBE, Shunichi MATSUMOTO, Shigenori KAWABATA, Shuta USHIO
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Publication number: 20180369568Abstract: A nerve stimulation apparatus is provided. The nerve stimulation apparatus detects nerve activities from a body surface and applies stimulation. The nerve stimulation apparatus includes a stimulation apparatus with multiple electrodes which are arranged on skin and a current supply unit which supplies a current to the electrodes, which stimulation apparatus provides the current to a living body percutaneously to stimulate a target nerve; a measurement apparatus which measures activities of muscles governed by the nerve according to the stimulation from the stimulation apparatus; and an information processing apparatus which determines, based on a measurement result of the nerve activities obtained from the measurement apparatus, which electrode is capable of providing the target nerve activities equal to or greater than a desired value.Type: ApplicationFiled: November 7, 2016Publication date: December 27, 2018Inventors: Takafumi ISHIBE, Shigenori KAWABATA, Takumi YAMAGA, Hiroshi DEGUCHI, Koji YAMAGUCHI, Shunichi MATSUMOTO
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Patent number: 8847394Abstract: A disclosed laminated structure includes a wettability-variable layer containing a wettability-variable material whose surface energy changes when energy is applied thereto and including at least a high-surface-energy area having high surface energy and a low-surface-energy area having low surface energy; and a conductive layer formed on the high-surface-energy area. The high-surface-energy area includes a first area and a second area extending from the first area and having a width smaller than that of the first area.Type: GrantFiled: July 12, 2011Date of Patent: September 30, 2014Assignee: Ricoh Company, Ltd.Inventors: Atsushi Onodera, Hidenori Tomono, Koei Suzuki, Takanori Tano, Takumi Yamaga
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Publication number: 20140212705Abstract: A solid dye sensitization type solar cell includes a substrate, a first electrode disposed on the substrate, an electron transport layer including an electron transport semiconductor and disposed on the first electrode, the electron transport layer including a photosensitizing compound adsorbed on a surface of the electron transport semiconductor, a hole transport layer disposed on the electron transport layer, and a second electrode disposed on the hole transport layer. Each of the first electrode and the second electrode includes divided multiple electrodes.Type: ApplicationFiled: January 15, 2014Publication date: July 31, 2014Applicant: RICOH COMPANY, LTD.Inventors: Tamotsu Horiuchi, Tohru Yashiro, Hiroshi Deguchi, Hisamitsu Kamezaki, Takumi Yamaga, Keiichiroh Yutani, Yuko Arizumi
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Patent number: 8779434Abstract: A thin film transistor array is disclosed. The thin film transistor array includes plural gate electrodes formed on an insulation substrate, plural source electrodes formed above or under the gate electrodes via a gate insulation film so that the source electrodes cross the gate electrodes in a planar view, plural drain electrodes formed at corresponding positions surrounded by the gate electrodes and the source electrodes in a planar view in the same layer as that of the source electrodes, semiconductor layers formed via the gate insulation film to face the gate electrodes for forming corresponding channel regions between the source electrodes and the drain electrodes. The plural gate electrodes are linearly formed, and the channel regions are disposed to face the gate electrodes.Type: GrantFiled: October 6, 2008Date of Patent: July 15, 2014Assignee: Ricoh Company, Ltd.Inventors: Takao Inoue, Takumi Yamaga, Atsushi Onodera
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Patent number: 8711297Abstract: A display device includes a substrate; a matrix of scan lines and signal lines formed on the substrate; switching elements formed in pixel areas defined by the scan lines and the signal lines crossing each other; a first insulating film formed over the scan lines, the signal lines, and the switching elements; and display elements to be driven by the switching elements. The pixel areas are located in a display area and the first insulating film has openings above the scan lines or the signal lines in an outer area outside of the display area.Type: GrantFiled: February 18, 2010Date of Patent: April 29, 2014Assignee: Ricoh Company, Ltd.Inventors: Kohji Matsuoka, Takumi Yamaga, Akishige Murakami, Naoyuki Ueda
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Patent number: 8598570Abstract: An organic transistor array includes gate electrodes provided on a substrate, source and drain electrodes provided above or below the gate electrodes via a gate insulator layer, and an organic semiconductor layer opposing the gate electrodes via the gate insulator layer, and forming a channel region between mutually adjacent source and drain electrodes. The organic transistor array in a plan view is sectioned into sections each forming a single pixel, and each section has a closest packed structure.Type: GrantFiled: June 24, 2009Date of Patent: December 3, 2013Assignee: Ricoh Company, Ltd.Inventors: Keiichiro Yutani, Takumi Yamaga, Atsushi Onodera
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Patent number: 8481995Abstract: An image display panel includes a gate electrode; a gate insulating film over the gate electrode; a source electrode, a drain electrode, and a first adhesive on the gate insulating film; an organic semiconductor layer on the source and drain electrodes including a space; an interlayer insulating film covering the gate insulating film, source electrode, organic semiconductor layer, and part of the drain electrode; a conductive layer on the interlayer insulating film; a second adhesive formed over the interlayer insulating film and conductive layer; an image display medium on the second adhesive; an inorganic film on the image display medium and first adhesive; and a second substrate on the inorganic film, where the first adhesive is arranged outside the second adhesive between the display medium and the conductive layer, and forms bonding between the inorganic film and the gate insulating film having a hydrophilic treatment formed on the first substrate.Type: GrantFiled: March 31, 2010Date of Patent: July 9, 2013Assignee: Ricoh Company, Ltd.Inventor: Takumi Yamaga
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Patent number: 8207528Abstract: An organic transistor includes a substrate; a gate electrode and a gate insulating film sequentially formed on the substrate in the stated order; and a source electrode, a drain electrode, and an organic semiconductor layer formed on at least the gate insulating film. Ultraviolet light is radiated to the substrate from a side without the gate electrode, transmitted through the substrate and the gate insulating film, reflected at the gate electrode, and absorbed at the organic semiconductor layer. Conductivity of the organic semiconductor layer that has absorbed the ultraviolet light is lower than that of the organic semiconductor layer that has not absorbed the ultraviolet light.Type: GrantFiled: October 17, 2008Date of Patent: June 26, 2012Assignee: Ricoh Company, Ltd.Inventors: Keiichiro Yutani, Hidenori Tomono, Takumi Yamaga
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Patent number: 8183563Abstract: A disclosed organic transistor includes a substrate; a gate electrode; a gate insulating film; source-drain electrodes; and an organic semiconductor layer. The gate electrode and the gate insulating film are disposed on the substrate in the stated order, and the source-drain electrodes and the organic semiconductor layer are disposed at least on the gate insulating film in the stated order. At least one of the source-drain electrodes includes a first part disposed directly above the gate electrode, a second part disposed not over the gate electrode, and a connecting part which has a width smaller than a width of the first part and connects the first part and the second part.Type: GrantFiled: November 13, 2008Date of Patent: May 22, 2012Assignee: Ricoh Company, Ltd.Inventors: Keiichiro Yutani, Takumi Yamaga, Takanori Tano
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Patent number: 8071432Abstract: A method of manufacturing an organic transistor active substrate is disclosed. The organic transistor active substrate includes an organic transistor in which a first electrode is formed on a substrate, a first insulating film is formed on the first electrode, a pair of second electrodes is formed on the first insulating film, and an active layer made of an organic semiconductor material is formed on the pair of second electrodes. The organic transistor is laminated with a second insulating film, and the second insulating film is laminated with a third electrode which is electrically coupled to one of the second electrodes via a through-hole provided through the second insulating film. The first electrode is formed by inkjet ejection; the first insulating film is formed by coating; the pair of second electrodes is formed by inkjet ejection; the active layer is formed by inkjet ejection; the second insulating film is formed by screen printing; and the third electrode is formed by screen printing.Type: GrantFiled: September 7, 2006Date of Patent: December 6, 2011Assignee: Ricoh Company, Ltd.Inventors: Yoshikazu Akiyama, Takumi Yamaga, Takanori Tano, Hidenori Tomono, Akishige Murakami, Hitoshi Arita, Mayuka Araumi
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Publication number: 20110275270Abstract: A display device includes a substrate; a matrix of scan lines and signal lines formed on the substrate; switching elements formed in pixel areas defined by the scan lines and the signal lines crossing each other; a first insulating film formed over the scan lines, the signal lines, and the switching elements; and display elements to be driven by the switching elements. The pixel areas are located in a display area and the first insulating film has openings above the scan lines or the signal lines in an outer area outside of the display area.Type: ApplicationFiled: February 18, 2010Publication date: November 10, 2011Inventors: Kohji Matsuoka, Takumi Yamaga, Akishige Murakami, Naoyuki Ueda
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Publication number: 20110266549Abstract: A disclosed laminated structure includes a wettability-variable layer containing a wettability-variable material whose surface energy changes when energy is applied thereto and including at least a high-surface-energy area having high surface energy and a low-surface-energy area having low surface energy; and a conductive layer formed on the high-surface-energy area. The high-surface-energy area includes a first area and a second area extending from the first area and having a width smaller than that of the first area.Type: ApplicationFiled: July 12, 2011Publication date: November 3, 2011Inventors: Atsushi ONODERA, Hidenori Tomono, Koei Suzuki, Takanori Tano, Takumi Yamaga
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Patent number: 8003533Abstract: A disclosed laminated structure includes a wettability-variable layer containing a wettability-variable material whose surface energy changes when energy is applied thereto and including at least a high-surface-energy area having high surface energy and a low-surface-energy area having low surface energy; and a conductive layer formed on the high-surface-energy area. The high-surface-energy area includes a first area and a second area extending from the first area and having a width smaller than that of the first area.Type: GrantFiled: August 1, 2007Date of Patent: August 23, 2011Assignee: Ricoh Company, Ltd.Inventors: Atsushi Onodera, Hidenori Tomono, Koei Suzuki, Takanori Tano, Takumi Yamaga
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Patent number: 7999253Abstract: An organic transistor is disclosed that has an organic semiconductor layer patterned with high resolution. The organic transistor includes a gate electrode, a gate insulting film, a source electrode, a drain electrode, and an organic semiconductor layer formed of an organic semiconductor material. The gate electrode, the gate insulting film, the source electrode, the drain electrode, and the organic semiconductor layer are formed on a substrate. At least one of the source electrode and the drain electrode has an opening.Type: GrantFiled: July 19, 2007Date of Patent: August 16, 2011Assignee: Ricoh Company, Ltd.Inventors: Takumi Yamaga, Ikue Kawashima, Yoshikazu Akiyama
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Publication number: 20100279460Abstract: To provide an organic thin film transistor including a pair of electrodes for allowing a current to flow through an organic semiconductor layer made of an organic semiconductor material, and a third electrode, wherein the organic semiconductor material is composed mainly of an arylamine polymer having a weight-average molecular weight (Mw) of 20,000 or more.Type: ApplicationFiled: July 15, 2010Publication date: November 4, 2010Inventors: Takumi Yamaga, Toshiya Sagisaka
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Publication number: 20100276676Abstract: An image display panel includes a gate electrode; a gate insulating film over the gate electrode; a source electrode, a drain electrode, and a first adhesive on the gate insulating film; an organic semiconductor layer on the source and drain electrodes including a space; an interlayer insulating film covering the gate insulating film, source electrode, organic semiconductor layer, and part of the drain electrode; a conductive layer on the interlayer insulating film; a second adhesive formed over the interlayer insulating film and conductive layer; an image display medium on the second adhesive; an inorganic film on the image display medium and first adhesive; and a second substrate on the inorganic film, where the first adhesive is arranged outside the second adhesive between the display medium and the conductive layer, and forms bonding between the inorganic film and the gate insulating film having a hydrophilic treatment formed on the first substrate.Type: ApplicationFiled: March 31, 2010Publication date: November 4, 2010Applicant: RICOH COMPANY, LTD.Inventor: Takumi YAMAGA
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Publication number: 20100193775Abstract: An organic transistor includes a substrate; a gate electrode and a gate insulating film sequentially formed on the substrate in the stated order; and a source electrode, a drain electrode, and an organic semiconductor layer formed on at least the gate insulating film. Ultraviolet light is radiated to the substrate from a side without the gate electrode, transmitted through the substrate and the gate insulating film, reflected at the gate electrode, and absorbed at the organic semiconductor layer. Conductivity of the organic semiconductor layer that has absorbed the ultraviolet light is lower than that of the organic semiconductor layer that has not absorbed the ultraviolet light.Type: ApplicationFiled: October 17, 2007Publication date: August 5, 2010Inventors: Keiichiro Yutani, Hidenori Tomono, Takumi Yamaga