Patents by Inventor Toshinori Oda
Toshinori Oda 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: 6624724Abstract: The present invention is intended to provide a line filter having an outstanding attenuation characteristic over a wide frequency band from low frequency band to high frequency band, with an improved elimination characteristic for common mode noises. To achieve this object, the invention incorporates a structure wherein a first coil unit (14) for second band and a second coil unit (16) for second band are disposed vertically to a closed-loop magnetic core (11).Type: GrantFiled: December 26, 2001Date of Patent: September 23, 2003Assignee: Matsuhita Electric Industrial Co., Ltd.Inventors: Hiroshi Tomita, Toshinori Oda, Hirotaka Ishikawa, Tatsuya Mori
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Publication number: 20020158713Abstract: The present invention is intended to provide a line filter having an outstanding attenuation characteristic over a wide frequency band from low frequency band to high frequency band, with an improved elimination characteristic for common mode noises. To achieve this object, the invention incorporates a structure wherein a first coil unit (14) for second band and a second coil unit (16) for second band are disposed vertically to a closed-loop magnetic core (11).Type: ApplicationFiled: December 26, 2001Publication date: October 31, 2002Inventors: Hiroshi Tomita, Toshinori Oda, Hirotaka Ishikawa, Tatsuya Mori
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Patent number: 6078242Abstract: A line filter capable of eliminating the common mode noise and the normal mode noise altogether. It comprises both the common mode noise elimination means and the normal mode noise elimination means. A central magnetic core 32 is provided in the middle flange 34 of bobbin 23. A through-window 36 is provided at a place facing the counterpart feet 27 of closed magnetic circuit core 28 so as a part of the central magnetic core 32 is exposed, but the central magnetic core 32 and the closed magnetic circuit core 28 are not making contact with each other.Type: GrantFiled: July 1, 1999Date of Patent: June 20, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Tomita, Toshinori Oda, Hirotaka Ishikawa
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Patent number: 5745021Abstract: A line filter includes a magnetic core having a leg. A bobbin is placed around the leg of the magnetic core. The bobbin has end collars provided with projections respectively. A pair of windings are provided on the bobbin. A molded casing made of resin houses the magnetic core, the bobbin, and the windings. The casing has movable tongues which engage the projections on the bobbin collars to fix the bobbin to the casing. The casing has inner surfaces formed with ribs which engage the magnetic core to fix the magnetic core to the casing. The casing has an L-shaped movable member extending from a ceiling thereof and engaging the magnetic core to fix the magnetic core to the casing.Type: GrantFiled: March 17, 1997Date of Patent: April 28, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hisayo Miyoshi, Toshinori Oda, Tatsuya Mori, Shunya Inoue, Yutaka Tsutsumi
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Patent number: 5635891Abstract: A line filter includes a magnetic core having a leg. A bobbin is placed around the leg of the magnetic core. The bobbin has end collars provided with projections respectively. A pair of windings are provided on the bobbin. A molded casing made of resin houses the magnetic core, the bobbin, and the windings. The casing has movable tongues which engage the projections on the bobbin collars to fix the bobbin to the casing. The casing has inner surfaces formed with ribs which engage the magnetic core to fix the magnetic core to the casing. The casing has an L-shaped movable member extending from a ceiling thereof and engaging the magnetic core to fix the magnetic core to the casing.Type: GrantFiled: August 30, 1996Date of Patent: June 3, 1997Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hisayo Miyoshi, Toshinori Oda, Tatsuya Mori, Shunya Inoue, Yutaka Tsutsumi
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Patent number: 5227745Abstract: A line filter assembly adapted to be inserted in an electrical power supply circuit of various electronic appliances for avoiding an invasion and leakage of noise include first and second core members each having a pair of opposite arms connected together through a common bridge. Coils are formed on the arms of each of the core members in such a manner that directions of magnetic fluxes produced in the closed magnetic circuit as a result of flow of line currents counteract while the same coils are so arranged that the magnetic fluxes produced in the closed magnetic circuit as a result of the flow of the line currents are oriented in the same direction.Type: GrantFiled: April 30, 1992Date of Patent: July 13, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshinori Oda, Shunji Hashimoto, Tatsuya Mori
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Patent number: 5155457Abstract: A line filter assembly adapted to be inserted in an electrical power supply circuit of various electronic appliances for avoiding an invasion and leakage of noise includes first and second core members each having a pair of opposite arms connected together through a common bridge. Coils are formed on the arms of each of the core members in such a manner that directions of magnetic fluxes produced in the closed magnetic circuit as a result of flow of line currents counteract while the same coils are so arranged that the magnetic fluxes produced in the closed magnetic circuit as a result of the flow of the line currents are oriented in the same direction.Type: GrantFiled: June 17, 1991Date of Patent: October 13, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshinori Oda, Shunji Hashimoto, Tatsuya Mori
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Patent number: 4656078Abstract: A key top of a manually operated key, comprising a base member having a top face on which a legend identifying said key is printed, and a transparent protective layer covering at least an area of said top face of the base member in which the legend is disposed. The protective layer is made of a mixture of a transparent base material, and a transparent finely particulate material which is different in refractive index from said base material.Type: GrantFiled: September 23, 1985Date of Patent: April 7, 1987Assignee: Brother Kogyo Kabushiki KaishaInventors: Hideo Goto, Takeo Hosoe, Toshinori Oda
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Patent number: 4516978Abstract: A key button molded of a synthetic resin and having on the top surface thereof a character or symbol printed with a coloring agent comprising a dye and a solvent which is capable of dissolving the dye and the synthetic resin, wherein the character or symbol is durably formed on the top surface by the action of the solvent on the surface and body to cause the dye to permeate the surface and the body.Type: GrantFiled: September 19, 1983Date of Patent: May 14, 1985Assignee: Brother Kogyo Kabushiki KaishaInventors: Hideo Goto, Takeo Hosoe, Toshinori Oda, Sosuke Ohtsuka