Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7371291 | Grain-oriented magnetic steel sheet having no undercoat film comprising forsterite as primary component and having good magnetic characteristics | Yasuyuki Hayakawa, Seiji Okabe, Takeshi Imamura | 2008-05-13 |
| RE39482 | Method of making grain-oriented magnetic steel sheet having low iron loss | Yasuyuki Hayakawa, Michiro Komatsubara | 2007-02-06 |
| 6942740 | Grain-oriented magnetic steel sheet having no undercoat film comprising forsterite as primary component and having good magnetic characteristics | Yasuyuki Hayakawa, Seiji Okabe, Takeshi Imamura | 2005-09-13 |
| 6811619 | Method of manufacturing grain-oriented electrical steel sheets | Yasuyuki Hayakawa, Hideo Yamagami, Seiji Okabe, Takeshi Imamura, Minoru Takashima | 2004-11-02 |
| 6758915 | Grain oriented electromagnetic steel sheet exhibiting extremely small watt loss and method for producing the same | Minoru Takashima, Mineo Muraki, Hiroi Yamaguchi, Michiro Komatsubara | 2004-07-06 |
| 6676771 | Method of manufacturing grain-oriented electrical steel sheet | Minoru Takashima, Tetsuo Toge, Yasuyuki Hayakawa, Michiro Komatsubara | 2004-01-13 |
| 6602357 | Grain oriented electrical steel sheet with low iron loss and production method for same | Kunihiro Senda, Toshito Takamiya, Tadashi Nakanishi, Hiroaki Toda | 2003-08-05 |
| 6562473 | Electrical steel sheet suitable for compact iron core and manufacturing method therefor | Seiji Okabe, Yasuyuki Hayakawa, Takeshi Imamura | 2003-05-13 |
| 6531001 | Non-oriented magnetic steel sheet having low iron loss and high magnetic flux density and manufacturing method therefor | Yasuyuki Hayakawa, Masaki Kawano, Michiro Komatsubara, Yuka Komori, Kazuaki Tamura | 2003-03-11 |
| 6475304 | Grain-oriented silicon steel sheet and process for production thereof | Hiroaki Toda, Kunihiro Senda, Makoto Watanabe, Atsuhito Honda | 2002-11-05 |
| 6444051 | Method of manufacturing a grain-oriented electromagnetic steel sheet | Michiro Komatsubara, Kazuaki Tamura | 2002-09-03 |
| 6436199 | Non-oriented magnetic steel sheet having low iron loss and high magnetic flux density and manufacturing method therefor | Yasuyuki Hayakawa, Masaki Kawano, Michiro Komatsubara, Yuka Komori, Kazuaki Tamura | 2002-08-20 |
| 6432227 | Electromagnetic steel sheet and process for producing the same | Yasuyuki Hayakawa, Michiro Komatsubara | 2002-08-13 |
| 6423157 | Method of making grain-oriented magnetic steel sheet having low iron loss | Yasuyuki Hayakawa, Michiro Komatsubara | 2002-07-23 |
| 6406558 | Method for manufacturing magnetic steel sheet having superior workability and magnetic properties | Masaki Kawano, Michiro Komatsubara, Keiji Sakai, Toshiro Fujiyama | 2002-06-18 |
| 6322635 | Electromagnetic steel sheet and process for producing the same | Yasuyuki Hayakawa, Michiro Komatsubara | 2001-11-27 |
| 6309473 | Method of making grain-oriented magnetic steel sheet having low iron loss | Yasuyuki Hayakawa, Michiro Komatsubara | 2001-10-30 |
| 6287392 | Grain-oriented silicon steel sheet and process for production thereof | Hiroaki Toda, Kunihiro Senda, Makoto Watanabe, Atsuhito Honda | 2001-09-11 |
| 6280534 | Grain oriented electromagnetic steel sheet and manufacturing thereof | Kunihiro Senda, Toshito Takamiya, Makoto Watanabe | 2001-08-28 |
| 5885371 | Method of producing grain-oriented magnetic steel sheet | Michiro Komatsubara, Toshito Takamiya, Kunihiro Senda, Mineo Muraki, Chizuko Goto +1 more | 1999-03-23 |
| 5620533 | Method for making grain-oriented silicon steel sheet having excellent magnetic properties | Keisuke Kotani, Masaki Kawano, Hirotake Ishitobi, Masayuki Sakaguchi, Takafumi Suzuki +1 more | 1997-04-15 |
| 5244511 | Method of manufacturing an oriented silicon steel sheet having improved magnetic flux density | Michiro Komatsubara, Yasuyuki Hayakawa, Takahiro Kan, Toshio Sadayori | 1993-09-14 |
| 5181972 | Process for producing grain oriented silicon steel sheets having excellent magnetic properties | Michiro Komatsubara, Yasuyuki Hayakawa, Yoshiaki Iida, Toshio Sadayori | 1993-01-26 |
| 5139582 | Method of manufacturing an oriented silicon steel sheet having improved magnetic characeristics | Michiro Komatsubara, Katsuo Iwamoto, Takahiro Kan, Toshio Sadayori | 1992-08-18 |
| 5127971 | Method of producing grain oriented silicon steel sheets having improved magnetic properties and bending properties by electrolytic degreasing | Michiro Komatsubara, Yasuyuki Hayakawa, Takahiro Kan, Toshio Sandayori | 1992-07-07 |