Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875947 | Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property | Hisanobu Nakayama, Osamu Tanaka, Hiromichi Yasumoto, Seiichi Senoo, Youichi Zaizen | 1989-10-24 |
| 4846903 | Method for producing a grain oriented electrical steel sheet | Eiji Ikezaki, Yasunori Tano, Hiroshi Nishizaka | 1989-07-11 |