Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868089 | Positive image forming method | Tatsuhiko Kobayashi, Ken Okauchi | 1989-09-19 |
| 4837141 | Thermally developable light-sensitive material containing a development restrainer compound | Junichi Kohno, Ken Okauchi, Masaru Iwagaki, Tawara Komamura | 1989-06-06 |