Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5063945 | Tobacco filter stock | Taizo Sugihara, Hiromu Sonoda | 1991-11-12 |
| 4284793 | Method for producing plasticizers | Fumio Sagara, Hiroshi Kawabata | 1981-08-18 |
| 4268362 | Method for purifying acetic acid | Tetsuya Ogawa, Norio Yoshizaki, Tadakatsu Katsuragi, Makoto Nakamura | 1981-05-19 |