Patents by Inventor Takaaki Hatori
Takaaki Hatori 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: 11647933Abstract: Provided is a biological information detection device capable of restraining noise from being mixed with a signal relating to biological information. A biological information detection device includes an electrode pad that is able to detect a signal (bioelectric signal) relating to biological information of a subject (for example, a fetus in a mother's body), a connector that is connectable to the electrode pad, and a cable that is connected to the connector and is able to transmit the signal. The electrode pad and the connector are provided with fixing members and that are attachable to and detachable from each other, respectively.Type: GrantFiled: September 27, 2018Date of Patent: May 16, 2023Assignees: ATOM MEDICAL CORPORATION, SEKISUI PLASTICS CO., LTDInventors: Kazuhiko Sudo, Naoko Odagiri, Kazunari Oowada, Ichiro Matsubara, Takaaki Hatori, Takahiko Fujita, Kazuhiro Yoshikawa
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Patent number: 11375952Abstract: An adhesive hydrogel has low contact resistance against the body surface and excellent conformability and adhesiveness to the body surface, so that noise generation can be reduced. Such adhesive hydrogel enables measurements of weak fetal heart rate signals. The adhesive hydrogel includes a polymer matrix prepared by crosslinking-copolymerization of an acrylamide derivative, which is a nonionic polymerizable monomer including a polymerizable carbon-carbon double bond in a molecule, and polyfunctional (meth)acrylamide, which is a crosslinkable monomer comprising 2 or more polymerizable carbon-carbon double bonds in a molecule, water, a polyvalent alcohol, and an electrolyte salt, wherein a laminate of the adhesive hydrogel with an Ag/AgCl sheet exhibits the impedance of 1? to 100? at the frequency of 0.1 Hz measured in accordance with the method of ANSI/AAMI EC12:2000, and the dynamic elastic modulus G? at the frequency of 1 Hz measured at 25° C. and dispersed frequencies is 1.0×103 Pa to 1.0×104 Pa.Type: GrantFiled: September 27, 2018Date of Patent: July 5, 2022Assignee: SEKISUI PLASTICS CO., LTD.Inventors: Takaaki Hatori, Takahiko Fujita, Kazuhiro Yoshikawa
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Patent number: 11197991Abstract: An object of the present invention is to provide a gel sheet comprising an intermediate base, having no variation in adhesiveness. A gel sheet 1 comprising a gel material 10 and an intermediate base 20 embedded in the gel material 10, wherein when T represents the thickness of the gel sheet 1, and S represents the amplitude of the intermediate base 20, a relation represented by the following expression (1) is satisfied: S/T?0.Type: GrantFiled: June 27, 2017Date of Patent: December 14, 2021Assignee: SEKISUI PLASTICS CO., LTD.Inventors: Kazuki Kato, Ryo Iizuka, Takaaki Hatori, Takashi Motomura, Kazuhiro Yoshikawa, Yoshiki Nakayama
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Publication number: 20210361214Abstract: Provided is a biological information detection device capable of restraining noise from being mixed with a signal relating to biological information. A biological information detection device includes an electrode pad that is able to detect a signal (bioelectric signal) relating to biological information of a subject (for example, a fetus in a mother's body), a connector that is connectable to the electrode pad, and a cable that is connected to the connector and is able to transmit the signal. The electrode pad and the connector are provided with fixing members and that are attachable to and detachable from each other, respectively.Type: ApplicationFiled: September 27, 2018Publication date: November 25, 2021Inventors: Kazuhiko SUDO, Naoko ODAGIRI, Kazunari OOWADA, Ichiro MATSUBARA, Takaaki HATORI, Takahiko FUJITA, Kazuhiro YOSHIKAWA
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Publication number: 20200253555Abstract: An adhesive hydrogel has low contact resistance against the body surface and excellent conformability and adhesiveness to the body surface, so that noise generation can be reduced. Such adhesive hydrogel enables measurements of weak fetal heart rate signals. The adhesive hydrogel includes a polymer matrix prepared by crosslinking-copolymerization of an acrylamide derivative, which is a nonionic polymerizable monomer including a polymerizable carbon-carbon double bond in a molecule, and polyfunctional (meth)acrylamide, which is a crosslinkable monomer comprising 2 or more polymerizable carbon-carbon double bonds in a molecule, water, a polyvalent alcohol, and an electrolyte salt, wherein a laminate of the adhesive hydrogel with an Ag/AgCl sheet exhibits the impedance of 1? to 100? at the frequency of 0.1 Hz measured in accordance with the method of ANSI/AAMI EC12:2000, and the dynamic elastic modulus G? at the frequency of 1 Hz measured at 25° C. and dispersed frequencies is 1.0×103 Pa to 1.0×104 Pa.Type: ApplicationFiled: September 27, 2018Publication date: August 13, 2020Applicant: SEKISUI PLASTICS CO., LTD.Inventors: Takaaki HATORI, Takahiko FUJITA, Kazuhiro YOSHIKAWA
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Publication number: 20190217079Abstract: An object of the present invention is to provide a gel sheet comprising an intermediate base, having no variation in adhesiveness. A gel sheet 1 comprising a gel material 10 and an intermediate base 20 embedded in the gel material 10, wherein when T represents the thickness of the gel sheet 1, and S represents the amplitude of the intermediate base 20, a relation represented by the following expression (1) is satisfied: S/T?0.4 . . .Type: ApplicationFiled: June 27, 2017Publication date: July 18, 2019Applicant: SEKISUI PLASTICS CO., LTD.Inventors: Kazuki KATO, Ryo IIZUKA, Takaaki HATORI, Takashi MOTOMURA, Kazuhiro YOSHIKAWA, Yoshiki NAKAYAMA
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Patent number: 10307103Abstract: A pad for electrodes (1) including a first conductive adhesive sheet (2) for connection with an electrode, a second conductive adhesive sheet (4) for connection with another electrode, the second conductive adhesive sheet positioned to be spaced apart from the first conductive adhesive sheet in a planar direction of each conductive adhesive sheet, and a base (10) supporting the first conductive adhesive sheet and the second conductive adhesive sheet. At least one surface of each of the first conductive adhesive sheet and the second conductive adhesive sheet is exposed, and each of the first conductive adhesive sheet and the second conductive adhesive sheet has a thickness compressibility of 10% or less and a thickness recovery ratio of 95% or more. The base is a non-electroconductive base having a water absorption capacity of 1 to 1.5 times, and the pad has a moisture permeability of 1,000 g/m2/24 h or more.Type: GrantFiled: September 30, 2015Date of Patent: June 4, 2019Assignee: SEKISUI PLASTICS CO., LTD.Inventors: Takaaki Hatori, Yasuaki Shioyama, Kazuhiro Yoshikawa
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Publication number: 20170332967Abstract: A pad for electrodes (1) including a first conductive adhesive sheet (2) for connection with an electrode, a second conductive adhesive sheet (4) for connection with another electrode, the second conductive adhesive sheet positioned to be spaced apart from the first conductive adhesive sheet in a planar direction of each conductive adhesive sheet, and a base (10) supporting the first conductive adhesive sheet and the second conductive adhesive sheet. At least one surface of each of the first conductive adhesive sheet and the second conductive adhesive sheet is exposed, and each of the first conductive adhesive sheet and the second conductive adhesive sheet has a thickness compressibility of 10% or less and a thickness recovery ratio of 95% or more. The base is a non-electroconductive base having a water absorption capacity of 1 to 1.5 times, and the pad has a moisture permeability of 1,000 g/m2/24 h or more.Type: ApplicationFiled: September 30, 2015Publication date: November 23, 2017Inventors: Takaaki HATORI, Yasuaki SHIOYAMA, Kazuhiro YOSHIKAWA
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Patent number: 9803115Abstract: Disclosed is an adhesive hydrogel containing a polymer matrix, water, and a polyhydric alcohol, wherein the polymer matrix contains a copolymer of a monofunctional monomer with a single polymerizable C—C double bond and a polyfunctional monomer with two or more polymerizable C—C double bonds, the monofunctional monomer contains a nonionic (meth)acrylamide-based monomer, and the polyfunctional monomer has a composition formula: ClHmOn, where O is an oxygen atom in an ether bond, l is an integer greater than or equal to 4, m is an integer greater than or equal to 6, and n is an integer greater than or equal to 0.Type: GrantFiled: September 28, 2012Date of Patent: October 31, 2017Assignee: Sekisui Plastics Co., Ltd.Inventors: Takaaki Hatori, Kaori Sato, Takahiko Fujita, Kengo Nakamura
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Patent number: 9175195Abstract: An adhesive hydrogel contains: a polymer matrix of a copolymer of a monofunctional monomer and a crosslinking monomer (a); another polymer component; water; and a polyhydric alcohol, wherein: either a structural unit derived from the monofunctional monomer contained in the polymer matrix or the other polymer component or both contain a structural unit derived from at least one compound (b) selected from the group consisting of ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid salts, and ethylenically unsaturated carboxylic acid derivatives having a hydroxyl group, an acid group, a salt thereof, an amino group, and/or an ammonium group; and the other polymer component contains a polymer compound (c) with a side chain having an oxyalkylene group or a polyoxyalkylene group.Type: GrantFiled: July 4, 2012Date of Patent: November 3, 2015Assignee: SEKISUI PLASTICS CO., LTD.Inventors: Kaori Sato, Takaaki Hatori, Yasuhiro Fujiwara
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Publication number: 20150021201Abstract: Disclosed is an adhesive hydrogel containing a polymer matrix, water, and a polyhydric alcohol, wherein the polymer matrix contains a copolymer of a monofunctional monomer with a single polymerizable C—C double bond and a polyfunctional monomer with two or more polymerizable C—C double bonds, the monofunctional monomer contains a nonionic (meth)acrylamide-based monomer, and the polyfunctional monomer has a composition formula: ClHmOn, where O is an oxygen atom in an ether bond, l is an integer greater than or equal to 4, m is an integer greater than or equal to 6, and n is an integer greater than or equal to 0.Type: ApplicationFiled: September 28, 2012Publication date: January 22, 2015Applicant: Sekisui Plastics Co., Ltd.Inventors: Takaaki Hatori, Kaori Sato, Takahiko Fujita, Kengo Nakamura
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Publication number: 20140296418Abstract: An adhesive hydrogel contains: a polymer matrix of a copolymer of a monofunctional monomer and a crosslinking monomer (a); another polymer component; water; and a polyhydric alcohol, wherein: either a structural unit derived from the monofunctional monomer contained in the polymer matrix or the other polymer component or both contain a structural unit derived from at least one compound (b) selected from the group consisting of ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid salts, and ethylenically unsaturated carboxylic acid derivatives having a hydroxyl group, an acid group, a salt thereof, an amino group, and/or an ammonium group; and the other polymer component contains a polymer compound (c) with a side chain having an oxyalkylene group or a polyoxyalkylene group.Type: ApplicationFiled: July 4, 2012Publication date: October 2, 2014Applicant: SEKISUI PLASTICS CO., LTD.Inventors: Kaori Sato, Takaaki Hatori, Yasuhiro Fujiwara
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Publication number: 20130289157Abstract: A composition for an adhesive hydrogel, comprising at least: a polymeric matrix former; water; and a polyhydric alcohol; the polymeric matrix former comprising at least: (a) (meth)acrylic acid, a (meth)acrylic acid derivative or a vinyl derivative having 2 carboxyl groups and 4 or 5 carbon atoms; (b) (meth)acrylamide or a (meth)acrylamide derivative; (c) N-vinyl-2-caprolactam and/or N-vinyl-2-valerolactam; and (d) a cross-linkable monomer, wherein the content percentage of the (b) in the composition for an adhesive hydrogel is 2 to 20% by weight.Type: ApplicationFiled: August 12, 2011Publication date: October 31, 2013Applicant: SEKISUI PLASTICS CO., LTD.Inventors: Kaori Sato, Takaaki Hatori, Yasuhiro Fujiwara