Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871442 | Ion sensor | Shuichiro Yamaguchi, Norio Daikuhara | 1989-10-03 |
| 4861454 | Oxygen sensor | Norihiko Ushizawa | 1989-08-29 |
| 4839020 | Gas sensor | Shuichiro Yamaguchi, Norio Daikuhara | 1989-06-13 |
| 4816118 | Ion-sensitive FET sensor | Noboru Oyama, Shuichiro Yamaguchi | 1989-03-28 |
| 4798664 | Ion sensor | Shuichiro Yamaguchi, Norihiko Ushizawa | 1989-01-17 |