Patents by Inventor Seiko Mitachi
Seiko Mitachi 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: 20180242900Abstract: A swallowing movement monitoring sensor which measures swallowing movement of a subject includes an outside shape variation sensor attached to a laryngeal portion of the subject and a microphone attached in an ear of the subject. The outside shape variation sensor includes an optical fiber sheet. The optical fiber sheet detects variation in quantity of transmitted light based on a loss caused by a lateral pressure applied to an optical fiber from the laryngeal portion in association with variation in outside shape of the laryngeal portion involved with swallowing movement. The microphone detects swallowing sound produced in the ear in association with swallowing movement.Type: ApplicationFiled: August 21, 2015Publication date: August 30, 2018Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuhiro KUWA, Toshifumi HOSOYA, Seiko MITACHI, Tomoyuki HAJI
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Patent number: 9765246Abstract: An object of the present invention is to provide an adhesive composition for a high-power optical fiber having a low pull-in amount. The adhesive composition for a high-power optical fiber of the present invention contains: a compound (A) having an aromatic ring and a reactive silicon-containing group; a glycidyl compound (B); and a compound (C) having a silsesquioxane cage structure.Type: GrantFiled: February 19, 2015Date of Patent: September 19, 2017Assignee: The Yokohama Rubber Co., Ltd.Inventors: Hirokazu Kageyama, Kazushi Kimura, Seiko Mitachi
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Patent number: 9725629Abstract: An object of the present invention is to provide an adhesive composition for a polarization-maintaining optical fiber exhibiting a high extinction ratio. The adhesive composition for a polarization-maintaining optical fiber of the present invention contains: a compound (A) having an aromatic ring and a reactive silicon-containing group; a glycidyl compound (B); and a compound (C) having a silsesquioxane ladder structure.Type: GrantFiled: February 19, 2015Date of Patent: August 8, 2017Assignee: The Yokohama Rubber Co., Ltd.Inventors: Hirokazu Kageyama, Kazushi Kimura, Seiko Mitachi
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Publication number: 20170073557Abstract: An object of the present invention is to provide an adhesive composition for a high-power optical fiber having a low pull-in amount. The adhesive composition for a high-power optical fiber of the present invention contains: a compound (A) having an aromatic ring and a reactive silicon-containing group; a glycidyl compound (B); and a compound (C) having a silsesquioxane cage structure.Type: ApplicationFiled: February 19, 2015Publication date: March 16, 2017Inventors: Hirokazu KAGEYAMA, Kazushi KIMURA, Seiko MITACHI
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Publication number: 20170009114Abstract: An object of the present invention is to provide an adhesive composition for a polarization-maintaining optical fiber exhibiting a high extinction ratio. The adhesive composition for a polarization-maintaining optical fiber of the present invention contains: a compound (A) having an aromatic ring and a reactive silicon-containing group; a glycidyl compound (B); and a compound (C) having a silsesquioxane ladder structure.Type: ApplicationFiled: February 19, 2015Publication date: January 12, 2017Inventors: Hirokazu KAGEYAMA, Kazushi KIMURA, Seiko MITACHI
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Patent number: 9420964Abstract: A body motion sensor, such as an SAS diagnostic device, with which a subject can be examined in a state close to that in an ordinary living environment and it is possible to clearly discriminate between an apnea state and a hypopnea state by means of a relatively simple analytical method; and an optical fiber sheet suitable for use in the sensor. The body motion sensor, such as an SAS diagnostic device, comprises a light source such as an LED, an optical fiber sheet, and an analysis unit that determines fluctuations in the quantity of light outputted from the optical fiber sheet and detects motions of the body.Type: GrantFiled: March 24, 2010Date of Patent: August 23, 2016Assignees: Sumitomo Electric Industries, Ltd.Inventors: Seiko Mitachi, Toshifumi Hosoya, Kazuhiro Kuwa
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Patent number: 9186078Abstract: An optical fiber sheet 10 includes an optical fiber 11 and a wire 12 that are arranged between a first sheet and a second sheet. The optical fiber 11 is a multi-mode optical fiber having a core of silica glass to which a refractive index adjuster is added, has a numerical aperture equal to or less than 0.30 and a flexural rigidity equal to or less than 0.50 N·mm2, and is bent to be arranged between the first sheet and the second sheet. The wire 12 intersects the optical fiber 11 between the first sheet and the second sheet.Type: GrantFiled: October 3, 2012Date of Patent: November 17, 2015Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuyuki Sohma, Kazuhiro Kuwa, Toshifumi Hosoya, Masumi Ito, Seiko Mitachi
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Publication number: 20140270669Abstract: An optical fiber sheet 10 includes an optical fiber 11 and a wire 12 that are arranged between a first sheet and a second sheet. The optical fiber 11 is a multi-mode optical fiber having a core of silica glass to which a refractive index adjuster is added, has a numerical aperture equal to or less than 0.30 and a flexural rigidity equal to or less than 0.50 N·mm2, and is bent to be arranged between the first sheet and the second sheet. The wire 12 intersects the optical fiber 11 between the first sheet and the second sheet.Type: ApplicationFiled: October 3, 2012Publication date: September 18, 2014Inventors: Kazuyuki Sohma, Kazuhiro Kuwa, Toshifumi Hosoya, Masumi Ito, Seiko Mitachi
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Publication number: 20120070112Abstract: A body motion sensor, such as an SAS diagnostic device, with which a subject can be examined in a state close to that in an ordinary living environment and it is possible to clearly discriminate between an apnea state and a hypopnea state by means of a relatively simple analytical method; and an optical fiber sheet suitable for use in the sensor. The body motion sensor, such as an SAS diagnostic device, comprises a light source such as an LED, an optical fiber sheet, and an analysis unit that determines fluctuations in the quantity of light outputted from the optical fiber sheet and detects motions of the body.Type: ApplicationFiled: March 24, 2010Publication date: March 22, 2012Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Seiko Mitachi, Toshifumi Hosoya, Kazuhiro Kuwa
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Patent number: 7968667Abstract: To provide adhesive compositions for optical fibers which are curable with moisture and excellent in adhesiveness and resistance to moist heat. An Adhesive composition for optical fibers containing (A) a component having a reactive silicon containing group which contains (e) a compound obtained by reacting (a) an epoxy compound having at least one epoxy group with (b) a silane coupling agent having both a reactive silicon containing group and an epoxy-reactive group, wherein the component (A) has a molecular weight of 1000 or below per reactive silicon containing group; and an adhesive composition for optical fibers containing an alkylsilyl ester and (B) a compound other than the alkylsilyl ester which has at least one reactive silicon containing group.Type: GrantFiled: August 22, 2005Date of Patent: June 28, 2011Assignees: The Yokohama Rubber Co., Ltd.Inventors: Seiko Mitachi, Atsushi Kikkawa, Kazushi Kimura
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Patent number: 7574893Abstract: The present invention provides a biomimetic odor sensor that utilizes neither an oxide semiconductor nor a quartz oscillator, is hardly affected by the atmospheric moisture, simple in structure, inexpensive in production cost, fast in reaction rate, of a wet type, and provided with the condition close to the condition of the nasal mucosa of the human olfactus organ. The sensor 10 according to the present invention includes a mixed material 12 in which ?-carotene and a reducing agent to prevent the oxidation of the ?-carotene are dispersed in a viscous liquid, and a cathode electrode 16 and an anode electrode 18 are disposed so as to be in contact with the mixed material 12.Type: GrantFiled: May 24, 2005Date of Patent: August 18, 2009Assignees: Katayanagi Institute, Seiko MitachiInventors: Seiko Mitachi, Toshio Matsunaga
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Publication number: 20080009562Abstract: [Problems] To provide adhesive compositions for optical fibers which are curable with moisture and excellent in adhesiveness and resistance to moist heat. [Means For Solving Problems] An Adhesive composition for optical fibers containing (A) a component having a reactive silicon containing group which contains (e) a compound obtained by reacting (a) an epoxy compound having at least one epoxy group with (b) a silane coupling agent having both a reactive silicon containing group and an epoxy-reactive group, wherein the component (A) has a molecular weight of 1000 or below per reactive silicon containing group; and an adhesive composition for optical fibers containing an alkylsilyl ester and (B) a compound other than the alkylsilyl ester which has at least one reactive silicon containing group.Type: ApplicationFiled: August 22, 2005Publication date: January 10, 2008Applicants: THE YOKOHAMA RUBBER CO., LTD.Inventors: Seiko Mitachi, Atsushi Kikkawa, Kazushi Kimura
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Publication number: 20070151324Abstract: The present invention provides a biomimetic odor sensor that utilizes neither an oxide semiconductor nor a quartz oscillator, is hardly affected by the atmospheric moisture, simple in structure, inexpensive in production cost, fast in reaction rate, of a wet type, and provided with the condition close to the condition of the nasal mucosa of the human olfactus organ. The sensor 10 according to the present invention includes a mixed material 12 in which ?-carotene and a reducing agent to prevent the oxidation of the ?-carotene are dispersed in a viscous liquid, and a cathode electrode 16 and an anode electrode 18 are disposed so as to be in contact with the mixed material 12.Type: ApplicationFiled: May 24, 2005Publication date: July 5, 2007Inventors: Seiko Mitachi, Toshio Matsunaga
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Patent number: 6170995Abstract: In order to provide a ferrule for an optical-fiber connector used for good organization of an optical communication network, the ferrule for an optical-fiber connector is made of a crystallized glass having a composition which consists essentially of, by weight percent, 60-70% of SiO2, 16-25% of Al2O3, 1.5-3% of Li2O, 0.5-2.5% of MgO, 1.3-4.5% of TiO2, 0.5-3% of ZrO2, 2-6.5% of TiO2+ZrO2, 1-5.5% of K2O, 0-7% of ZnO, and 0-3% of BaO. The crystallized glass includes 30-70 volume % precipitation of &bgr;-spodumene solid solution or &bgr;-quartz solid solution having an average grain size not greater than 2 &mgr;m. In addition, the crystallized glass has a bend strength of 200 MPa or more and a thermal expansion coefficient of −10˜50×10−7/° C. at a temperature between −50 and 150° C.Type: GrantFiled: July 23, 1999Date of Patent: January 9, 2001Assignees: Nippon Telegraph and Telephone Corporation, NEC Corporation, Nippon Electric Glass Co., Ltd.Inventors: Seiko Mitachi, Ryo Nagase, Yoshiaki Takeuchi, Takashi Tanabe, Akihiko Sakamoto, Hirokazu Takeuchi, Masayuki Ninomiya, Katsumi Inada
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Patent number: 5940548Abstract: A guided-wave circuit with a phase adjusting plate which adjusts optical path length errors, occurring during the manufacture of PLC, by an additional processing performed after the production of the PLC; and a method for producing the guided-wave circuit. A guided-wave circuit with an amplitude adjusting plate which adjusts the amplitude characteristics of light by an additional processing performed after the production of the PLC; and a method for producing the guided-wave circuit. A guided-wave circuit with a birefringence adjusting plate which adjusts the birefringence of light by an additional processing subsequent to the manufacture of the PLC; as well as a method for producing the guided-wave circuit.Type: GrantFiled: July 8, 1997Date of Patent: August 17, 1999Assignee: Nippon Telegraph and Telephone CorporationInventors: Hiroaki Yamada, Yasuyuki Inoue, Kazumasa Takada, Seiko Mitachi, Makoto Abe
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Patent number: 5841926Abstract: Disclosed are optical fibers for optical attenuation comprising a core and a cladding, wherein the cladding comprises two or more parts different from each other in their refractive indices and/or the attenuating dopant existence. By using the optical fibers for optical attenuation of the present invention, an optical attenuator which can effectively reduce the effect of cladding mode upon coupling of optical fibers and is excellent in characteristic stability can be manufactured at a low cost.Type: GrantFiled: December 27, 1996Date of Patent: November 24, 1998Assignees: Nippon Telegraph and Telephone Corporation, Showa Electric Wire & Cable Co., Ltd.Inventors: Yoshiaki Takeuchi, Ryo Nagase, Seiko Mitachi, Yuichi Morishita, Akira Kumagai, Yumi Ariga, Kenichi Muta, Kazunari Sugi, Masashi Saijo
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Patent number: 5694506Abstract: When plug is fitted to adapter, optical fiber is inserted to an alignment hole for the optical fiber. By providing a taper at the entrance thereof, even if the tip of the optical fiber is deviated from the central position, the deviation is absorbed to make it possible for the optical fiber to be inserted smoothly. When two plugs is fitted to adapter, the tip of one optical fiber is confronted with the other one in the alignment hole, and excessive length L.sub.1 -L.sub.2 is pushed into the two optical fiber-bending spaces with a suitable distribution, thus the optical fiber buckles therein. The end face of the optical fiber is subjected to flat surface-polishing, removal of ripples after being cleaved, or chamfer grinding after being cleaved. The buckling portion of the optical fiber is coated with carbon or the like.Type: GrantFiled: March 11, 1996Date of Patent: December 2, 1997Assignee: Nippon Telegraph and Telephone CorporationInventors: Masaru Kobayashi, Shin'ichi Iwano, Ryo Nagase, Seiko Mitachi, Yoshiaki Takeuchi, Shuichiro Asakawa
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Patent number: 5278107Abstract: Optical parts and optical equipment, including lenses, mirrors and laser media made of athermal glasses having compositions comprising 0-13 mol % CdO, 9-24 mol % CdF.sub.2, 5-10 mol % LiF, 30-34.5 mol % AlF.sub.3 28-33.5 mol % PbF.sub.2, 0-4 mol % KF, 0-6.5 mol % YF.sub.3, and 0-2 mol % LaF.sub.3 and having little or no optical path length change as a function of temperature in the infrared region of 1.mu.m to 5.mu.m.Type: GrantFiled: November 27, 1991Date of Patent: January 11, 1994Assignee: Corning IncorporatedInventors: Paul A. Tick, Seiko Mitachi
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Patent number: 4969710Abstract: An optical fiber transmission path wherein total dispersion of the system is compensated by use of fibers composed of glasses with total dispersion of opposite signs at the operating wavelength for the system. With silica-based fibers, CdF.sub.2 --LiF--AlF.sub.3 --PbF.sub.2 --KF--YF.sub.3 fluoride glass-based fibers may be used for a system with 1.55 .mu.m operating wavelength.Type: GrantFiled: April 5, 1989Date of Patent: November 13, 1990Assignee: Corning IncorporatedInventors: Paul A. Tick, Seiko Mitachi
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Patent number: 4380588Abstract: An infrared ray-transmitting glass composition for optical fibers consisting essentially of 28 mol % to 38 mol % of BaF.sub.2, 2 mol % to 7 mol % of GdF.sub.3 and 58 mol % to 69 mol % of ZrF.sub.4, and optical fibers comprising said glass composition.Type: GrantFiled: January 18, 1982Date of Patent: April 19, 1983Assignee: Nippon Telegraph & Telephone Public CorporationInventors: Seiko Mitachi, Shuichi Shibata, Terutoshi Kanamori, Toyotaka Manabe, Mitsuho Yasu