Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885215 | Zn-coated stainless steel welded pipe | Kenji Watanabe, Yasushi Kato | 1989-12-05 |
| 4855803 | Selectively definable semiconductor device | Hideo Azumai, Koichi Fujii, Takashi Seigenji | 1989-08-08 |