Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4406869 | Process for producing anhydrous sodium carbonate crystal | Keiichi Nakaya, Suekazu Hirata | 1983-09-27 |
| 4405592 | Process for producing anhydrous sodium carbonate crystal | Keiichi Nakaya, Suekazu Hirata | 1983-09-20 |