Patents by Inventor Kenji Yazawa
Kenji Yazawa 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: 11848151Abstract: When manufacturing a magnetic body which is made of a ferrite material containing Fe, Ni, and Zn, and whose Mn content is 0.1288 percent by mass or higher, or a magnetic body which is made of a ferrite material containing Fe, Ni, Zn, and Cu, and whose Mn content is 0.1178 percent by mass or higher, an iron oxide powder whose Mn content is 0.20 percent by mass or higher is used as a raw material powder.Type: GrantFiled: September 22, 2022Date of Patent: December 19, 2023Assignee: TAIYO YUDEN CO., LTD.Inventors: Norihiro Asako, Kenji Yazawa, Makoto Aoki, Tomomi Kobayashi
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Patent number: 11798726Abstract: A coil component according to one embodiment of the invention includes a core and a winding wound around the core. The core includes a plurality of ferrite crystal grains and a plurality of Bi segregated regions situated at a grain boundary of the plurality of ferrite crystal grains. In one embodiment, a plurality of line profiles obtained by detecting the content of Bi along a plurality of scanning lines intersecting with the grain boundary include at least one first line profile that has a detection peak of Bi at the grain boundary and two or more second line profiles that have no detection peak of Bi.Type: GrantFiled: September 21, 2020Date of Patent: October 24, 2023Assignee: TAIYO YUDEN CO., LTD.Inventors: Kenji Yazawa, Atsushi Shimamura
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Publication number: 20230035861Abstract: When manufacturing a magnetic body which is made of a ferrite material containing Fe, Ni, and Zn, and whose Mn content is 0.1288 percent by mass or higher, or a magnetic body which is made of a ferrite material containing Fe, Ni, Zn, and Cu, and whose Mn content is 0.1178 percent by mass or higher, an iron oxide powder whose Mn content is 0.20 percent by mass or higher is used as a raw material powder.Type: ApplicationFiled: September 22, 2022Publication date: February 2, 2023Inventors: Norihiro ASAKO, Kenji YAZAWA, Makoto AOKI, Tomomi KOBAYASHI
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Patent number: 11488773Abstract: When manufacturing a magnetic body whose primary component is Ni—Zn ferrite, an iron oxide powder whose Mn content is 0.20 to 0.85 percent by mass is used as a raw material powder, or, in addition to using an iron oxide powder whose Mn content is 0.20 percent by mass or higher as a raw material powder, a mol ratio of Ni to Zn (Ni/Zn) in the ferrite material is determined based on the Mn content in the iron oxide powder and the raw material powders are compounded in such a way that the mol ratio is achieved. The magnetic body does not contain any additives as essential components other than the primary components of the Ni—Zn ferrite material. A coil component using the magnetic body has excellent direct-current superimposition property and magnetic permeability.Type: GrantFiled: December 14, 2020Date of Patent: November 1, 2022Assignee: TAIYO YUDEN CO., LTD.Inventors: Norihiro Asako, Kenji Yazawa, Makoto Aoki, Tomomi Kobayashi
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Publication number: 20210202167Abstract: When manufacturing a magnetic body whose primary component is Ni—Zn ferrite, an iron oxide powder whose Mn content is 0.20 to 0.85 percent by mass is used as a raw material powder, or, in addition to using an iron oxide powder whose Mn content is 0.20 percent by mass or higher as a raw material powder, a mol ratio of Ni to Zn (Ni/Zn) in the ferrite material is determined based on the Mn content in the iron oxide powder and the raw material powders are compounded in such a way that the mol ratio is achieved. The magnetic body does not contain any additives as essential components other than the primary components of the Ni—Zn ferrite material. A coil component using the magnetic body has excellent direct-current superimposition property and magnetic permeability.Type: ApplicationFiled: December 14, 2020Publication date: July 1, 2021Inventors: Norihiro ASAKO, Kenji YAZAWA, Makoto AOKI, Tomomi KOBAYASHI
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Publication number: 20210098176Abstract: A coil component according to one embodiment of the invention includes a core and a winding wound around the core. The core includes a plurality of ferrite crystal grains and a plurality of Bi segregated regions situated at a grain boundary of the plurality of ferrite crystal grains. In one embodiment, a plurality of line profiles obtained by detecting the content of Bi along a plurality of scanning lines intersecting with the grain boundary include at least one first line profile that has a detection peak of Bi at the grain boundary and two or more second line profiles that have no detection peak of Bi.Type: ApplicationFiled: September 21, 2020Publication date: April 1, 2021Inventors: Kenji YAZAWA, Atsushi SHIMAMURA
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Patent number: 9444086Abstract: According to one embodiment, a battery unit includes a first cell unit, a second cell unit and a third cell unit arranged adjacent to the first cell unit, respectively. Each cell unit includes a plurality of secondary battery cells, and the respective secondary battery cells are formed of a main body of a substantially rectangular solid shape and a pair of first and second electrodes of different polarities each other pulled out from one end of the main body. A first bus bar connects the first electrodes of the first cell unit and the second electrodes of the second cell unit in a first line, and a second bus bar connects the second electrodes of the first cell unit and the first electrodes of the third cell unit in a second line.Type: GrantFiled: September 10, 2010Date of Patent: September 13, 2016Assignee: Kabushiki Kaisha ToshibaInventors: Hideo Shimizu, Nagaaki Muro, Masahiro Sekino, Hidenori Miyamoto, Mitsuhiro Saito, Kenji Yazawa, Toshinori Uchida
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Publication number: 20110076521Abstract: According to one embodiment, a battery unit includes a first cell unit, a second cell unit and a third cell unit arranged adjacent to the first cell unit, respectively. Each cell unit includes a plurality of secondary battery cells, and the respective secondary battery cells are formed of a main body of a substantially rectangular solid shape and a pair of first and second electrodes of different polarities each other pulled out from one end of the main body. A first bus bar connects the first electrodes of the first cell unit and the second electrodes of the second cell unit in a first line, and a second bus bar connects the second electrodes of the first cell unit and the first electrodes of the third cell unit in a second line.Type: ApplicationFiled: September 10, 2010Publication date: March 31, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hideo Shimizu, Nagaaki Muro, Masahiro Sekino, Hidenori Miyamoto, Mitsuhiro Saito, Kenji Yazawa, Toshinori Uchida
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Patent number: 7297423Abstract: A PCB that can transmit a high frequency signal of a GHz band with a low loss includes an insulator and magnetic nanoparticles dispersed in the insulator.Type: GrantFiled: February 25, 2005Date of Patent: November 20, 2007Assignees: Sony Corporation, Migaku TakahashiInventors: Mikihisa Mizuno, Yuichi Sasaki, Makoto Inoue, Kenji Yazawa, Migaku Takahashi, Yasuo Tateno, Teiichi Miyauchi
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Publication number: 20050238858Abstract: A PCB that can transmit a high frequency signal of a GHz band with a low loss includes an insulator and magnetic nanoparticles dispersed in the insulator.Type: ApplicationFiled: February 25, 2005Publication date: October 27, 2005Inventors: Mikihisa Mizuno, Yuichi Sasaki, Makoto Inoue, Kenji Yazawa, Migaku Takahashi, Yasuo Tateno, Teiichi Miyauchi
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Patent number: 6064551Abstract: The present invention provides a high quality magnetoresistance effect type magnetic head having an increased reproduction output and capable of applying a uniform bias magnetic field to a magnetoresistance effect layer without increasing an impedance. The magnetoresistance effect type magnetic head according to the present invention includes: a magnetic layer 11 magnetized approximately in a vertical direction to a plane 14 opposing to a magnetic recording medium; a non-magnetic insulation layer 12 formed on the magnetic layer 11; and a magnetoresistance effect layer 13 formed on the non-magnetic insulation layer 12 and exhibiting the magnetoresistance effect. In the longitudinal type magnetoresistance effect type magnetic head according to the present, the detection current supplied to a magnetoresistance element is prevented from flowing into a hard magnetic film to lower the head reproduction output.Type: GrantFiled: February 25, 1998Date of Patent: May 16, 2000Assignee: Sony CorporationInventors: Akio Takada, Takuji Shibata, Moriaki Abe, Tadayuki Honda, Kenji Yazawa, Hiroaki Narisawa
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Patent number: 6031693Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.Type: GrantFiled: June 4, 1997Date of Patent: February 29, 2000Assignee: Sony CorporationInventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
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Patent number: 5943312Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.Type: GrantFiled: June 4, 1997Date of Patent: August 24, 1999Assignee: Sony CorporationInventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
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Patent number: 5682280Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.Type: GrantFiled: November 4, 1994Date of Patent: October 28, 1997Assignee: Sony CorporationInventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
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Patent number: 5535075Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.Type: GrantFiled: April 20, 1993Date of Patent: July 9, 1996Assignee: Sony CorporationInventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
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Patent number: 5144512Abstract: A magnetic recording disk comprising at least a magnetic layer on a circular rigid substrate with a physically abraded surface having a uniform series of physical circumferential texturing, wherein the relationship between the value Rv from the diametrical arithmetic-average center line to the deepest valley and the value Rp from such center line to the highest peak is selectively determined as Rp/Rv.gtoreq.0.6 so that the CSS durability is enhanced.Type: GrantFiled: January 22, 1991Date of Patent: September 1, 1992Assignee: Sony CorporationInventors: Kiyoshi Ota, Kazuhiro Kimura, Kenji Yazawa
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Patent number: D884598Type: GrantFiled: September 8, 2017Date of Patent: May 19, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Masafumi Ebisawa, Kenji Yazawa, Kenji Shigehisa, Makoto Nagasato, Ryousuke Kasaya
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Patent number: D887968Type: GrantFiled: September 8, 2017Date of Patent: June 23, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Masafumi Ebisawa, Kenji Yazawa, Kenji Shigehisa, Makoto Nagasato, Ryousuke Kasaya
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Patent number: D916654Type: GrantFiled: February 24, 2020Date of Patent: April 20, 2021Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Ebisawa, Kenji Yazawa, Kenji Shigehisa, Makoto Nagasato, Ryousuke Kasaya
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Patent number: D926119Type: GrantFiled: May 19, 2020Date of Patent: July 27, 2021Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Ebisawa, Kenji Yazawa, Kenji Shigehisa, Makoto Nagasato, Ryousuke Kasaya