Patents by Inventor Koji Taketomi
Koji Taketomi 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: 11087914Abstract: In a common mode choke coil having a magnetic core, a decrease in peak value of a common mode impedance in a vicinity of its resonance frequency is suppressed. A common mode choke coil includes a non-magnetic layer, a first magnetic layer formed on a top surface of the non-magnetic layer, a second magnetic layer formed on a bottom surface of the non-magnetic layer, a magnetic core provided between the first magnetic layer and the second magnetic layer so that its axis extends in a top-bottom direction, a first coil conductor embedded in the non-magnetic layer and wound around the magnetic core, a second coil conductor embedded in the non-magnetic layer and wound around the magnetic core, and a first magnetic gap provided between a top surface of the magnetic core and a bottom surface of the first magnetic layer. The magnetic core is made of a ferrite material.Type: GrantFiled: February 12, 2018Date of Patent: August 10, 2021Assignee: TAIYO YUDEN CO., LTD.Inventors: Daizo Yokoyama, Koji Taketomi, Kenichiro Nogi, Hidemi Iwao
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Publication number: 20180286558Abstract: In a common mode choke coil having a magnetic core, a decrease in peak value of a common mode impedance in a vicinity of its resonance frequency is suppressed. A common mode choke coil includes a non-magnetic layer, a first magnetic layer formed on a top surface of the non-magnetic layer, a second magnetic layer formed on a bottom surface of the non-magnetic layer, a magnetic core provided between the first magnetic layer and the second magnetic layer so that its axis extends in a top-bottom direction, a first coil conductor embedded in the non-magnetic layer and wound around the magnetic core, a second coil conductor embedded in the non-magnetic layer and wound around the magnetic core, and a first magnetic gap provided between a top surface of the magnetic core and a bottom surface of the first magnetic layer. The magnetic core is made of a ferrite material.Type: ApplicationFiled: February 12, 2018Publication date: October 4, 2018Inventors: Daizo YOKOYAMA, Koji TAKETOMI, Kenichiro NOGI, Hidemi IWAO
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Patent number: 9030287Abstract: A filter body of a common mode noise filter includes: a non-magnetic body; a first magnetic body and a second magnetic body sandwiching the non-magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; and also has a non-magnetic first protective part and second protective part which are made of a non-magnetic material whose strength is higher than the first magnetic body and second magnetic body and which are positioned on the outermost side of the filter body in a manner sandwiching the first magnetic body and second magnetic body.Type: GrantFiled: September 9, 2011Date of Patent: May 12, 2015Assignee: Taiyo Yuden Co., Ltd.Inventors: Yoshiyuki Motomiya, Koji Taketomi, Kenichiro Nogi, Takumi Takahashi, Katsuyuki Kayahara
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Patent number: 8653928Abstract: A common mode noise filter includes: a first magnetic body and a second magnetic body; a non-magnetic body sandwiched between the first magnetic body and second magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; wherein a first lead conductor that connects one end of the first coil conductor to a first external terminal is embedded in the non-magnetic body 13, while a second lead conductor that connects one end of the second coil conductor to a third external terminal is embedded in the non-magnetic body.Type: GrantFiled: September 9, 2011Date of Patent: February 18, 2014Assignee: Taiyo Yuden Co., Ltd.Inventors: Kenichiro Nogi, Koji Taketomi, Yoshiyuki Motomiya, Takumi Takahashi, Hidemi Iwao, Masayuki Shimizu
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Publication number: 20130249661Abstract: A filter body of a common mode noise filter includes: a non-magnetic body; a first magnetic body and a second magnetic body sandwiching the non-magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; and also has a non-magnetic first protective part and second protective part which are made of a non-magnetic material whose strength is higher than the first magnetic body and second magnetic body and which are positioned on the outermost side of the filter body in a manner sandwiching the first magnetic body and second magnetic body.Type: ApplicationFiled: September 9, 2011Publication date: September 26, 2013Applicant: TAIYO YUDEN CO., LTD.Inventors: Yoshiyuki Motomiya, Koji Taketomi, Kenichiro Nogi, Takumi Takahashi, Katsuyuki Kayahara
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Publication number: 20130229252Abstract: A common mode noise filter includes: a first magnetic body and a second magnetic body; a non-magnetic body sandwiched between the first magnetic body and second magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; wherein a first lead conductor that connects one end of the first coil conductor to a first external terminal is embedded in the non-magnetic body 13, while a second lead conductor that connects one end of the second coil conductor to a third external terminal is embedded in the non-magnetic body.Type: ApplicationFiled: September 9, 2011Publication date: September 5, 2013Applicant: TAIYO YUDEN CO., LTD.Inventors: Kenichiro Nogi, Koji Taketomi, Yoshiyuki Motomiya, Takumi Takahashi, Hidemi Iwao, Masayuki Shimizu
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Patent number: 5994979Abstract: A noise filter has a magnetic core having a pair of magnetic core members each with a coupling surface. Each of the magnetic core members has a dented portion so arranged that, when the magnetic core members are closed together on the coupling surfaces, a closed magnetic path and an opening for inserting therethrough a cable are formed between the magnetic core members. An electrically insulating outer sheath member is disposed on an outer surface of each of the pair of magnetic core members. An electrically insulating coating member is disposed on an inner wall surface of each of the dented portions.Type: GrantFiled: January 27, 1998Date of Patent: November 30, 1999Assignee: Taiyo Yuden Kabushiki KaishaInventors: Koji Taketomi, Kiyoshi Tanbo