Issued Patents 1989
Showing 1–1 of 1 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, Youichi Zaizen, Kouji Yamasaki | 1989-10-24 |