Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5648543 | Process for producing 4-Nitrosodiphenylamines or their salts | Tetsuo Murata, Yasumi Katayama | 1997-07-15 |
| 5597512 | Method for preparing elongated-shaped silica sol | Yoshitane Watanabe, Yoshiyuki Kashima | 1997-01-28 |