Patents by Inventor Takahiko Fujita
Takahiko Fujita 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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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: 20210102059Abstract: It is an object of the present invention to provide a hydrogel, in which its initial high adhesive force is retained by suppressing the swelling of the gel due to invasion of water from the outside and reducing the loss of a plasticizer. The hydrogel of the present invention is a hydrogel comprising a polymer matrix, water and a plasticizer, wherein the hydrogel is characterized in that the plasticizer loss ratio is less than 2, the swelling rate is 115% or less when the hydrogel is exposed to the environment of 40° C. and 90% RH for 1 hour, and the initial adhesive force to a Bakelite plate is 100 gf/20 mm or more in the environment of 23° C. and 55% RH. The plasticizer is preferably polyoxyalkylene alkyl ether and/or sugar.Type: ApplicationFiled: March 25, 2019Publication date: April 8, 2021Applicant: SEKISUI KASEI CO., LTD.Inventors: Eisaku SATO, Takahiko FUJITA
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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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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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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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Patent number: 8541020Abstract: The invention aims at providing a polymeric hydrogel which is highly resistant to water washing. The aim is attained by a polymeric hydrogel comprising a polymeric matrix formed by copolymerizing a nonionic polymerizable monomer with a crosslinking monomer, characterized in that the polymeric matrix contains a wetting agent and water, at least 50 wt % of the wetting agent is constituted of a polymer prepared by polymerizing a polyhydric alcohol monomer component containing a trihydric or more alcohol monomer, and the polymer is a water-soluble one which has an average molecular weight of 150 to 4000 and satisfies the relationship: {(number of ether groups in the polymer+number of hydroxyl groups in the polymer)/number of carbon atoms present in the polymer}?1/3.Type: GrantFiled: September 17, 2002Date of Patent: September 24, 2013Assignee: Seikisui Plastics Co., Ltd.Inventors: Shuichi Sasahara, Kazuhiro Yosikawa, Shinichi Wakamatsu, Takahiko Fujita
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Patent number: 7868072Abstract: A gel adhesive composition of the invention contains a crosslinked water-soluble polymer, water, a moisturizer, an amphipathic polymer, a water-insoluble polymer having adhesiveness, and an electrolytic salt and the composition contains the water-insoluble polymer in an amount of 3 to 20% by weight and the amphipathic polymer in an amount of 0.05 to 7.0% by weight with respect to the total amount of the composition except water.Type: GrantFiled: March 25, 2005Date of Patent: January 11, 2011Assignee: Sekisui Plastics Co., Ltd.Inventors: Shuichi Sasahara, Takahiko Fujita, Kazuhiro Yoshikawa
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Patent number: 7829777Abstract: A music displaying apparatus stores in advance music piece related information concerning a music piece, and a plurality of comparison parameters which is associated with the music piece related information. The music displaying apparatus obtains voice data concerning singing of a user, analyzes the voice data to calculate a plurality of singing characteristic parameters which indicate a characteristic of the singing of the user. Next, the music displaying apparatus compares the plurality of singing characteristic parameters with the plurality of comparison parameters to calculate a similarity between the plurality of singing characteristic parameters and the plurality of comparison parameters. Then, the music displaying apparatus selects at least one piece of the music piece related information which is associated with a comparison parameter which has a high similarity with the singing characteristic parameter, and shows certain information based on the music piece related information.Type: GrantFiled: February 25, 2008Date of Patent: November 9, 2010Assignee: Nintendo Co., Ltd.Inventors: Koichi Kyuma, Yuichi Ozaki, Takahiko Fujita
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Publication number: 20090165633Abstract: A music displaying apparatus stores in advance music piece related information concerning a music piece, and a plurality of comparison parameters which is associated with the music piece related information. The music displaying apparatus obtains voice data concerning singing of a user, analyzes the voice data to calculate a plurality of singing characteristic parameters which indicate a characteristic of the singing of the user. Next, the music displaying apparatus compares the plurality of singing characteristic parameters with the plurality of comparison parameters to calculate a similarity between the plurality of singing characteristic parameters and the plurality of comparison parameters.Type: ApplicationFiled: February 25, 2008Publication date: July 2, 2009Applicant: Nintendo Co., Ltd.,Inventors: Koichi Kyuma, Yuichi Ozaki, Takahiko Fujita
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Publication number: 20070208130Abstract: A gel adhesive composition of the invention contains a crosslinked water-soluble polymer, water, a moisturizer, an amphipathic polymer, a water-insoluble polymer having adhesiveness, and an electrolytic salt and the composition contains the water-insoluble polymer in an amount of 3 to 20% by weight and the amphipathic polymer in an amount of 0.05 to 7.0% by weight with respect to the total amount of the composition except water.Type: ApplicationFiled: March 25, 2005Publication date: September 6, 2007Inventors: Shuichi Sasahara, Takahiko Fujita, Kazuhiro Yoshikawa
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Publication number: 20040191316Abstract: The invention aims at providing a polymeric hydrogel which is highly resistant to water washing.Type: ApplicationFiled: February 19, 2004Publication date: September 30, 2004Inventors: Shuichi Sasahara, Kazuhiro Yosikawa, Shinichi Wakamatsu, Takahiko Fujita