Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5024699 | Leuco dyes and recording materials using the same | Kiyotaka Iiyama, Kunio Hayakawa, Masahiro Nakata, Osamu Miyazaki | 1991-06-18 |
| 4985345 | Recording material | Kunio Hayakawa, Hiromi Furuya, Hisanori Shimada, Masahiro Nakata, Kouji Oohara +1 more | 1991-01-15 |
| 4925828 | Leuco dyes and recording materials using the same | Kiyotaka Iiyama, Kunio Hayakawa, Masahiro Nakata, Osamu Miyazaki | 1990-05-15 |
| 4668050 | Method of using liquid crystal device comprising dichroic dye and liquid crystal device | Hisashi Aoki, Tetsuo Okugawa | 1987-05-26 |