Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6444333 | Organic luminescent device material, organic luminescent device using the same, and tetraarylmethane compound | Hisashi Okada, Tadahisa Sato | 2002-09-03 |
| 6383276 | Azomethine compound and oily magenta ink | Katsuyoshi Yamakawa, Masuji Motoki, Ryo Suzuki, Tadahisa Sato, Hisashi Mikoshiba | 2002-05-07 |