Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853638 | Water quality control method, and method and apparatus for measuring electrical conductivity used in the water quality control | Masao Endou, Atsushi Watanabe, Masaharu Sakagami, Shunsuke Uchida, Makoto Nagase +2 more | 1989-08-01 |
| 4831324 | Method and apparatus for analyzing the electrode inpedance | Masao Endo, Shunsuke Uchida, Masami Matsuda, Kazumichi Suzuki | 1989-05-16 |