Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300677 | Method of preparing insoluble hydrolysable tannin and method of treating waste liquid with the tannin | Wataru Shirato | 1994-04-05 |
| 5296629 | Method of preparing insoluble hydrolysable tannin and method of treating waste liquid with the tannin | Wataru Shirato | 1994-03-22 |
| 5276251 | Process for treating organic phosphoric acids | Wataru Shirato | 1994-01-04 |