Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6670546 | Radio wave absorber | Katsumi Okayama, Yoshihiro Kato, Satoshi Sugimoto, Koichiro Inomata | 2003-12-30 |
| 6503963 | Radiowave absorbent and manufacturing method thereof | Sakan Iwashita, Katsumi Okayama | 2003-01-07 |