Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874221 | Fibre-type light wavelength conversion device | — | 1989-10-17 |
| 4852480 | Dot line printer with individually replaceable printing head | Masao Kunita, Michio Koizumi | 1989-08-01 |