Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840926 | High frequency wave absorbing ceramics | Nobuyuki Ohya, Toru Yamazaki, Taisei Katoh | 1989-06-20 |
| 4829030 | High frequency wave absorbing ceramics | Nobuyuki Ohya, Toru Yamazaki, Taisei Katoh | 1989-05-09 |
| 4824812 | High frequency wave absorbing ceramics | Nobuyuki Ohya, Toru Yamazaki, Taisei Katoh | 1989-04-25 |