Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821115 | Color hard copy apparatus having simplified analog-to-digital conversion with adjustable threshold levels | Kenichi Matsushima, Fumihiro Tanaka, Kaneo Yamaguchi, Shinya Watanabe | 1989-04-11 |
| 4812406 | Process for preparing optically active hydantoins | Satomi Takahashi, Yukio Yamada, Yasuyoshi Ueda, Yasuhiro Katayama, Kiyoshi Watanabe | 1989-03-14 |