Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5968835 | Method for estimating nitric acid and nitrous acid ions | Hiroshi Tsugura | 1999-10-19 |
| 5668014 | Device and method for estimating three nitrogen-including ionic substances in water | Hiroshi Tsugura | 1997-09-16 |
| 5094817 | Apparatus for quantitative determination of trihalomethanes | Kouji Kawakami, Yoshiharu Tanaka, Hiroshi Hoshikawa | 1992-03-10 |
| 4960711 | Method for the quantitative determination of trihalomethanes | Kouji Kawakami, Yoshiharu Tanaka, Hiroshi Hoshikawa | 1990-10-02 |