Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876143 | Rod material | Minoru Sugita, Teruyuki Nakatsuji, Tadashi Fujisaki, Noboru Ishikawa, Yasuo Inada | 1989-10-24 |
| 4873145 | Resin-coated aggregates | Takeji Okada, Minoru Imai, Daisuke Tachibana | 1989-10-10 |