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 | Osamu Tanaka, Hiromichi Yasumoto, Seiichi Senoo, Youichi Zaizen, Kouji Yamasaki | 1989-10-24 |
| 4797167 | Method for the production of oriented silicon steel sheet having excellent magnetic properties | Shouzaburo Nakashima, Yoshiaki Shimoyama, Yasukazu Mori | 1989-01-10 |