Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342454 | Method of producing grain oriented silicon steel sheet having low iron loss | Yasuyuki Hayakawa, Ujihiro Nishiike, Bunjiro Fukuda, Masataka Yamada, Yoshiaki Iida +1 more | 1994-08-30 |
| 5330586 | Method of producing grain oriented silicon steel sheet having very excellent magnetic properties | Yasuyuki Hayakawa, Katsuo Iwamoto, Makoto Watanabe, Toshito Takamiya | 1994-07-19 |
| 5306353 | Method of producing grain oriented silicon steel sheets having less iron loss | Yasuyuki Hayakawa, Takahiro Kan, Hirotake Ishitobi, Katsuo Iwamoto | 1994-04-26 |