Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883563 | Method of manufacturing a thin glass membrane | Katsuhiko Tomita, Takaaki Yada, Tsuyoshi Nakanishi | 1989-11-28 |
| 4872956 | Methods of measuring ion-concentration and the like and a calibrating sheet as well as a calibrating method of measuring devices used therein | Katsuhiko Tomita | 1989-10-10 |
| 4872966 | Sheet type electrode for use in the measurement of ion concentrations | Katsuhiko Tomita | 1989-10-10 |
| 4857166 | Reference electrode | — | 1989-08-15 |
| 4816132 | Sheet type electrode | Katsuhiko Tomita, Takaaki Yada, Tsuyoshi Nakanishi | 1989-03-28 |