Patents by Inventor Haruhiro Tsutsumi
Haruhiro Tsutsumi 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: 6830669Abstract: A biosensor having an electrode layer, which includes a working electrode and a counter electrode, and a reagent layer 10 are formed on an insulating support. Further, a spacer having a long and narrow cut-out portion on the reagent layer is bonded to a cover having an air hole to form a cavity that sucks blood as a liquid sample by capillary phenomenon, and a portion of side walls of the spacer and the cover, which side walls face the cavity, is subjected to a treatment for making the portion itself have hydrophilicity. Accordingly, when blood is sucked into the cavity by capillary phenomenon, the suction is promoted, and the performance of a sensor of the biosensor is improved. Further, the process of manufacturing the sensor is simplified, thereby resulting in increased productivity.Type: GrantFiled: October 16, 2001Date of Patent: December 14, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shoji Miyazaki, Haruhiro Tsutsumi, Eriko Yamanishi
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Publication number: 20040016642Abstract: An electrode layer comprising a working electrode 1 and a counter electrode 2, and a reagent layer 10 are formed on an insulating support 5 and, further, a spacer 7 having a long and narrow cut-out portion on the reagent layer 10 is bonded to a cover 6 having an air hole 9 to form a cavity 12 that sucks blood as a liquid sample by capillary phenomenon, and a portion of side walls of the spacer 7 and the cover 6, which side walls face the cavity 12, is subjected to a treatment for making the portion itself have hydrophilicity.Type: ApplicationFiled: October 16, 2001Publication date: January 29, 2004Inventors: Shoji Miyazaki, Haruhiro Tsutsumi, Eriko Yamanishi
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Patent number: 5650062Abstract: The biosensor of this invention can quantify a substrate in a sample liquid by electrochemically measuring the amount of an electron acceptor that has been reduced by electrons generated in a reaction between the substrate and an oxidoreductase. The biosensor has an electrically insulating substrate and an electrode system formed on the substrate including a working electrode, a counter electrode and a third electrode used for detecting a liquid junction. The third electrode can be used merely for detecting a liquid junction, or can be used as both a reference electrode and a liquid junction detecting electrode.Type: GrantFiled: September 12, 1995Date of Patent: July 22, 1997Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shin Ikeda, Toshihiko Yoshioka, Shiro Nankai, Haruhiro Tsutsumi, Hideyuki Baba, Yoshinobu Tokuno, Syoji Miyazaki
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Patent number: 5582697Abstract: The biosensor of this invention can quantify a substrate in a sample liquid by electrochemically measuring the amount of an electron acceptor that has been reduced by electrons generated in a reaction between the substrate and an oxidoreductase. The biosensor has an electrically insulating substrate and an electrode system formed on the substrate including a working electrode, a counter electrode and a third electrode used for detecting a liquid junction. The third electrode can be used merely for detecting a liquid junction, or can be used as both a reference electrode and a liquid junction detecting electrode.Type: GrantFiled: April 20, 1995Date of Patent: December 10, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shin Ikeda, Toshihiko Yoshioka, Shiro Nankai, Haruhiro Tsutsumi, Hideyuki Baba, Yoshinobu Tokuno, Syoji Miyazaki
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Patent number: 5565085Abstract: A biosensor for quantifying a specific compound has a reaction layer containing at least an enzyme, and an electrode system having a working electrode and a counter electrode formed on an insulating base plate; the biosensor detects the specific compound contained in a sample on the basis of an electrochemical response. In quantifying, the working electrode and the counter electrode are short-circuited before the voltage is applied therebetween. The short-circuiting eliminates measuring errors that may occur due to nonuniform dissolution of the reaction layer in a sample, and achieves highly reliable quantification of a specific compound.Type: GrantFiled: April 25, 1995Date of Patent: October 15, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shin Ikeda, Toshihiko Yoshioka, Shiro Nankai, Haruhiro Tsutsumi, Hideyuki Baba, Yoshinobu Tokuno
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Patent number: 5512159Abstract: A biosensor of the present invention is provided with an insulating base plate, an electrode system mainly consisting of a working electrode and a counter electrode formed on the insulating base plate, and a reaction layer on the electrode system. The counter electrode is partially a circular arc. A manufacturing method of the biosensor of the present invention is comprised of a step to form a base by arranging leads, an electrode system, and an insulating layer on an insulating base plate, and a step to form a reaction layer mainly composed of an enzyme on the electrode system. Since the counter electrode is partially in the shape of a circular arc, the reaction layer is easily formed and prevented from delaminating, whereby the measuring accuracy, preservative properties and reliability of the biosensor are improved. The present invention enables highly efficient biosensors to be mass produced at low cost.Type: GrantFiled: August 19, 1994Date of Patent: April 30, 1996Assignee: Matsushita Electric Industrial Co. Ltd.Inventors: Toshihiko Yoshioka, Mariko Kawaguri, Shiro Nankai, Haruhiro Tsutsumi, Hideyuki Baba, Yoshinobu Tokuno, Shoji Miyazaki
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Patent number: 5320732Abstract: The subject invention provides a simple sensor and an easy to handle biosensor measuring apparatus for the purpose of making measurements easily, rapidly and with high accuracy for specific components within a biological specimen such as blood.The biosensor of the subject invention is provided with a protrusion or a depression in a portion of a base having at least a measurement electrode and an opposing electrode. Also, the biosensor measuring apparatus is so configurated to have a mating means in the main body of the measuring apparatus freely supporting this biosensor to contact the said sensor's protrusion or depression, and further having the activating switch of the driving power supply located in this mating means.By means of these, it is possible to prevent wasteful measuring operations, as noted in the prior art biosensors, such as inserting the sensor backwards and making measurements with the sensor inserted backwards.Type: GrantFiled: June 11, 1993Date of Patent: June 14, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shiro Nankai, Mariko Kawaguri, Toshihiko Yoshioka, Haruhiro Tsutsumi, Minoru Fukuda
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Patent number: 5266179Abstract: A sensor 13 is inserted into a connector 14. A constant voltage required to obtain a response current is applied across the connector 14 by a voltage applying source 15 at timings required. A response current of the sensor 13 inserted into the connector 14 is converted into a voltage by a current-to-voltage converter 16, and the amount thereof is determined by a microcomputer, the analysis results being displayed onto a display unit.Type: GrantFiled: July 19, 1991Date of Patent: November 30, 1993Assignees: Matsushita Electric Industrial Co., Ltd., Kyoto Daiichi Kagaku Co., Ltd.Inventors: Shiro Nankai, Mariko Kawaguri, Toshihiko Yoshioka, Haruhiro Tsutsumi, Kyozo Terao, Naoki Tanimoto, Masahiro Yoshioka, Hiroshi Hyodo, Takatoshi Uchigaki