Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436663 | Process for separating porphyrins | Kenji Maruhashi, Ichiro Kojima, Yutaka Oguchi, Tetsuo Satoh | 1984-03-13 |
| 4383110 | Process for purifying and separating vitamin B.sub.12 | Tatsuo Kinoshita, Yutaka Oguchi, Kenji Maruhashi, Ichiro Kojima, Tetsuo Satoh | 1983-05-10 |