Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845455 | Thermally-sensible overcurrent protective relay including heater holder | Shigeharu Ootsuka | 1989-07-04 |
| 4808961 | Thermally-sensible overcurrent protective relay including contact toggle mechanism | Kiyohide Tsutsumi, Shigeharu Ootsuka | 1989-02-28 |