Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885215 | Zn-coated stainless steel welded pipe | Keiichi Yoshioka, Yasushi Kato | 1989-12-05 |
| 4843536 | AC input free power source | — | 1989-06-27 |
KW
Kenji Watanabe
Kawasaki Steel: 1 patents #38 of 194Top 20%
Overall (1989): #22,226 of 140,708Top 20%
2
Patents 1989