Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680720 | Illuminated signboard | Hiroshi Koyama | 1997-10-28 |
| 5474966 | Thermal recording material | Hiroshi Koyama | 1995-12-12 |
| 5108834 | Support for thermosensitive recording paper | — | 1992-04-28 |
| 4705719 | Synthetic paper of multilayer resin films | Masaaki Yamanaka, Masayuki Inoue | 1987-11-10 |