Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6440897 | Thermally sensitive recording medium | Takashi Date, Reiji Ohashi | 2002-08-27 |
| 5919928 | Phenanthridine derivatives and metal complexes thereof used for transparent recording medium or optical recording medium | Reiji Ohashi, Tomoaki Nagai, Hidetoshi Yoshioka | 1999-07-06 |
| 5892042 | Acridine derivative metal complexes used for transparent recording medium or optical recording medium | Reiji Ohashi, Tomoaki Nagai, Hidetoshi Yoshioka | 1999-04-06 |
| 5792863 | Acridine derivatives and metal complexes thereof used for transparent recording medium or optical recording medium | Reiji Ohashi, Tomoaki Nagai, Hidetoshi Yoshioka | 1998-08-11 |