Patents by Inventor Fumio Tatezono
Fumio Tatezono 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).
-
Publication number: 20120218682Abstract: A solid electrolytic capacitor including an anode, a dielectric layer formed on the anode, a polyvinyl alcohol film formed on the dielectric layer, and a conductive polymer layer formed on the polyvinyl alcohol film, wherein the polyvinyl alcohol film has a cross-linked structure.Type: ApplicationFiled: February 23, 2012Publication date: August 30, 2012Applicant: SANYO Electric Co., Ltd.Inventors: Keiichi KOMATSU, Koichi NISHIMURA, Fumio TATEZONO
-
Patent number: 7079376Abstract: An electric double layer capacitor is provided with a cell, in which a pair of polarizable electrodes, which are impregnated with an electrolyte, are disposed in opposition on either side of a separator; wherein the polarizable electrodes are provided with collector electrodes, a peripheral portion of the cell is sealed by a sealing member composed of synthetic resin, and the sealing member is formed by abutting two case halves.Type: GrantFiled: March 21, 2005Date of Patent: July 18, 2006Assignees: Sanyo Electric Co., Ltd., Furukawa Precision Engineering Co., Ltd.Inventors: Fumio Tatezono, Seiji Omura, Kiyotaka Ito, Tsuyoshi Komatsu, Makoto Hashimoto
-
Patent number: 7054138Abstract: An electric double layer capacitor is provided with a cell, in which a pair of polarizable electrodes, which are impregnated with an electrolyte, are disposed in opposition on either side of a separator; wherein the polarizable electrodes are provided with collector electrodes, and a peripheral portion of the cell is sealed by a sealing member composed of synthetic resin. The collector electrodes are composed of an alloy made of crystal grains of differing components and the collector electrodes pass through the sealing member while in intimate contact with the sealing member, extending to the outside of the sealing member. A metal plated layer made of crystal grains of a single component is formed on those locations on the collector electrodes that pass through the sealing member.Type: GrantFiled: March 21, 2005Date of Patent: May 30, 2006Assignees: Sanyo Electric Co., Ltd., Furukawa Precision Engineering Co., Inc.Inventors: Fumio Tatezono, Seiji Omura, Kiyotaka Ito, Tsuyoshi Komatsu, Makoto Hashimoto
-
Patent number: 6982865Abstract: A solid electrolytic capacitor formed with a dielectric coating and a solid electrolyte layer successively formed on a surface of an anode body, wherein the solid electrolyte layer includes a conductive polymer containing at least a tetrahydronaphthalenesulfonate ion and a naphthalenesulfonate ion as dopants or a conductive polymer containing at least a tetrahydronaphthalenesulfonate ion and a benzenesulfonate ion as dopants. As a result, a solid electrolytic capacitor having a low ESR and a good heat resistance is provided.Type: GrantFiled: October 1, 2004Date of Patent: January 3, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Yohei Kawata, Fumio Tatezono, Seiji Omura, Kouhei Gotou
-
Publication number: 20050213285Abstract: An electric double layer capacitor is provided with a cell, in which a pair of polarizable electrodes, which are impregnated with an electrolyte, are disposed in opposition on either side of a separator; wherein the polarizable electrodes are provided with collector electrodes, and a peripheral portion of the cell is sealed by a sealing member composed of synthetic resin. The collector electrodes are composed of an alloy made of crystal grains of differing components and the collector electrodes pass through the sealing member while in intimate contact with the sealing member, extending to the outside of the sealing member. A metal plated layer made of crystal grains of a single component is formed on those locations on the collector electrodes that pass through the sealing member.Type: ApplicationFiled: March 21, 2005Publication date: September 29, 2005Applicants: SANYO ELECTRIC CO., LTD, FURUKAWA PRECISION ENGINEERING CO., LTD.Inventors: Fumio Tatezono, Seiji Omura, Kiyotaka Ito, Tsuyoshi Komatsu, Makoto Hashimoto
-
Publication number: 20050213284Abstract: An electric double layer capacitor is provided with a cell, in which a pair of polarizable electrodes, which are impregnated with an electrolyte, are disposed in opposition on either side of a separator; wherein the polarizable electrodes are provided with collector electrodes, a peripheral portion of the cell is sealed by a sealing member composed of synthetic resin, and the sealing member is formed by abutting two case halves.Type: ApplicationFiled: March 21, 2005Publication date: September 29, 2005Applicants: SANYO ELECTRIC CO., LTD, FURUKAWA PRECISION ENGINEERING CO., LTD.Inventors: Fumio Tatezono, Seiji Omura, Kiyotaka Ito, Tsuyoshi Komatsu, Makoto Hashimoto
-
Patent number: 6912118Abstract: A solid electrolytic capacitor formed with a dielectric coating and a solid electrolyte layer successively formed on a surface of an anode body, wherein the solid electrolyte layer includes a conductive polymer containing at least a fluoroalkylnaphthalenesulfonate ion as a dopant. The conductive polymer can further contain a tetrahydronaphthalenesulfonate ion, a naphthalenesulfonate ion or a benzenesulfonate ion as the dopant. As a result, a solid electrolytic capacitor having a low ESR and a good heat resistance is provided.Type: GrantFiled: October 26, 2004Date of Patent: June 28, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Kenichiro Matsuzaki, Yohei Kawata, Seiji Omura, Fumio Tatezono, Yoshikazu Hirata
-
Publication number: 20050088804Abstract: A solid electrolytic capacitor formed with a dielectric coating and a solid electrolyte layer successively formed on a surface of an anode body, wherein the solid electrolyte layer includes a conductive polymer containing at least a fluoroalkylnaphthalenesulfonate ion as a dopant. The conductive polymer can further contain a tetrahydronaphthalenesulfonate ion, a naphthalenesulfonate ion or a benzenesulfonate ion as the dopant. As a result, a solid electrolytic capacitor having a low ESR and a good heat resistance is provided.Type: ApplicationFiled: October 26, 2004Publication date: April 28, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenichiro Matsuzaki, Yohei Kawata, Seiji Omura, Fumio Tatezono, Yoshikazu Hirata
-
Publication number: 20050078435Abstract: A solid electrolytic capacitor formed with a dielectric coating and a solid electrolyte layer successively formed on a surface of an anode body, wherein the solid electrolyte layer includes a conductive polymer containing at least a tetrahydronaphthalenesulfonate ion and a naphthalenesulfonate ion as dopants or a conductive polymer containing at least a tetrahydronaphthalenesulfonate ion and a benzenesulfonate ion as dopants. As a result, a solid electrolytic capacitor having a low ESR and a good heat resistance is provided.Type: ApplicationFiled: October 1, 2004Publication date: April 14, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yohei Kawata, Fumio Tatezono, Seiji Omura, Kouhei Gotou
-
Patent number: 6067703Abstract: A combined thin film magnetic head includes a magnetoresistive reproducing head part and an inductive recording head part. The magnetoresistive reproducing head part is defined between a lower shielding layer and a merged core layer. The inductive recording head part is defined between the merged core layer and an upper core layer and is configured to specify a track width for the recording head part by providing the upper core layer in a localized region W.sub.2. A method of fabricating the magnetic head includes steps of forming an etching-protective layer on a gap layer so as to provide an exposed region W.sub.1 left uncovered which is larger than the localized region W.sub.2 in which the upper core layer is to be finally confined, depositing the upper core layer over the entire surfaces thereof, and etching the upper core layer so as to finally confine the etched upper core layer in the localized region W.sub.2.Type: GrantFiled: March 3, 1998Date of Patent: May 30, 2000Assignee: Sanyo Electric Co., Ltd.Inventors: Seiichirou Takahashi, Junichi Sano, Fumio Tatezono
-
Patent number: 6012218Abstract: The invention provides a thin film magnetic head including an upper core layer 9 which comprises a front first core layer 91a formed on a gap spacer layer 6 and having the same width as a track width on the recording medium at least in the vicinity of the face to be opposed to a recording medium, and a second core layer 92 extending from the medium-opposed face over the upper surface of the front first core layer 91a and further over the upper surface of an upper insulating layer 72. The upper core layer 9 has a thickness greater in a region extending from the medium-opposed face to a depth end restricting face DE of a lower insulating layer 71 than in a region extending over the upper surface of the upper insulating layer 72. The front first core layer 91a has an upper surface flush with the upper surface of the lower insulating layer 71. This structure gives an accurate track width and assures production with a high yield.Type: GrantFiled: March 17, 1998Date of Patent: January 11, 2000Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshiaki Shimizu, Fumio Tatezono, Naoto Matono, Takashi Ogura, Hiroyuki Okuda, Katsumi Umeda
-
Patent number: 5622812Abstract: An optical material contains a photochromic compound which is expressed in the following general formula (I): ##STR1## where A represents an oxygen atom, a nitrogen atom, or a substituted nitrogen atom, B represents a thiophene ring, benzothiophene ring, pyrrole ring or indole ring, R.sub.1 represents a methyl group, an alkoxy group or a perfluoroalkyl group, R.sub.2 to R.sub.7 represent a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group and the like respectively. This photochromic compound may be bonded with a polymer as a side chain in the position of A.Type: GrantFiled: March 6, 1995Date of Patent: April 22, 1997Assignees: Sanyo Electric Co., Ltd., Masahiro Irie, Kobe Natural ProductsInventors: Fumio Tatezono, Toshio Harada, Masahiro Irie, Meguru Ohara
-
Patent number: 5604002Abstract: An optical recording medium includes a recording layer, and a masking layer which is converted to a state having small absorption at the wavelength of a reproducing beam due to progress of decoloration caused by a thermal reaction upon irradiation with the reproducing beam, or due to facilitation of decoloration caused by a photon mode photochromic reaction through temperature rise upon irradiation with the reproducing beam.Type: GrantFiled: March 21, 1995Date of Patent: February 18, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Tsuyoshi Tsujioka, Toshio Harada, Kazuhiko Kuroki, Fumio Tatezono
-
Patent number: 5443940Abstract: Disclosed herein is an optical recording material containing a photochromic compound which is expressed in the following general formula (I): ##STR1## where A represents an oxygen atom or a substituted or unsubstituted nitrogen atom, R.sub.1 represents an alkoxy group, R.sub.2 to R.sub.5 represent substituents such as a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group and the like respectively, and B represents a substituted or unsubstituted thiophene ring, benzothiophene ring, pyrrole ring or indole ring.Type: GrantFiled: April 14, 1993Date of Patent: August 22, 1995Assignees: Sanyo Electric Co., Ltd., Kobe Natural Products & Chemicals Co., Ltd.Inventors: Fumio Tatezono, Toshio Harada, Masahiro Irie, Meguru Ohara
-
Patent number: 5376511Abstract: Disclosed herein is an optical recording medium comprising a recording layer containing a photochromic material and a polymer which are so combined with each other that a photostationary state attained upon irradiation with light of a specific wavelength is varied with temperatures, a reflective layer for reflecting light which is passed through the recording layer, and a substrate for supporting a laminate of the recording layer and the reflective layer.Type: GrantFiled: December 20, 1993Date of Patent: December 27, 1994Assignees: Masahiro Irie, Sanyo Electric Co., Ltd.Inventors: Fumio Tatezono, Masahiro Irie, Toshio Harada, Koutaro Matsuura
-
Patent number: 5316900Abstract: A recording medium comprises a recording layer, a birefringent layer, and a reflecting layer. The recording layer is formed of a material whose optical rotatory power is alterable such that in one state no optical rotatory power is present and, in a second state, optical rotatory power is present. Information is recorded in the recording layer by selectively altering the state of the recording layer. The birefringent layer is formed of a material having constant birefringence without regard to the state of the recording layer. The reflecting layer reflects a light beam transmitted through the recording layer and the birefringent layer to reintroduce the beam into the birefringent layer and the recording layer. A method of reproducing information from this recording medium applies a polarized light beam to the recording medium and detects change of the polarized state of the polarized light beam reflected from the recording medium, thereby reading the information recorded in the recording layer.Type: GrantFiled: October 15, 1993Date of Patent: May 31, 1994Assignees: Sanyo Electric Co., Ltd., Masahiro IrieInventors: Tsuyoshi Tsujioka, Fumio Tatezono, Koutaro Matsuura, Masahiro Irie
-
Patent number: 5281501Abstract: Disclosed herein is a recording/reproducing method for an optical recording medium comprising a step of heating a recording layer containing a photochromic material and a polymer which are so combined with each other that a photostationary state attained upon irradiation with light of a specific wavelength is varied with temperatures, and a step of applying the light of a specific wavelength to the heated recording layer for bringing the same into a photostationary state and recording information. In order to reproduce the information, a portion of the recording layer which is in a photostationary state is selectively heated, and reproducing light is applied to reproduce recorded and unrecorded states.Type: GrantFiled: December 3, 1991Date of Patent: January 25, 1994Assignees: Masahiro Irie, Sanyo Electric Co., Ltd.Inventors: Fumio Tatezono, Irie Masahiro, Toshio Tanuma, Toshio Harada, Koutaro Matsuura
-
Patent number: 5272689Abstract: An optical head device for projecting a light beam on a recording medium to record data thereon or reproduce the recorded data comprises an optical system for forming a beam spot of a specified diameter on the surface of the recording medium, and a transparent contact member disposed at a light emanating portion of the system for the recording medium to come into direct sliding contact therewith. Accordingly, when the contact member moves relative to the recording medium, the dust adhering to the surface of medium is removed by the contact member to assure a recording or reproduction operation free of errors.Type: GrantFiled: October 10, 1989Date of Patent: December 21, 1993Assignee: Sanyo Electric Co., Ltd.Inventors: Tsuyoshi Tsujioka, Shigeaki Yamamoto, Fumio Tatezono, Minoru Kume, Kotaro Matsuura