Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861456 | Electrochemical device | Shigeo Soejima | 1989-08-29 |
| 4814930 | Optical zero-phase current and zero phase voltage sensing arrangement | Masanori Abe, Yoshinari Kozuka | 1989-03-21 |
| 4798693 | Method of manufacturing an electrochemical device | Shigeo Soejima | 1989-01-17 |
| 4797194 | Electrochemical element | Shigeo Soejima | 1989-01-10 |