Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4469878 | Method for manufacture of phthalic anhydride | Tadanori Hara | 1984-09-04 |
| 4191731 | Wet process using steel slag for waste gas desulfurization | Yoshiaki Miura, Akira Okamoto | 1980-03-04 |