Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5968835 | Method for estimating nitric acid and nitrous acid ions | Toyoaki Aoki | 1999-10-19 |
| 5668014 | Device and method for estimating three nitrogen-including ionic substances in water | Toyoaki Aoki | 1997-09-16 |