Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824748 | Method of making a color separation filter including monomolecular film layers of coupled dyestuff | Shigeyuki Uematsu | 1989-04-25 |
| 4821675 | Color filter dyeing apparatus | Masahiko Ikeno | 1989-04-18 |