Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837046 | Method for forming ferrite film | Masao Oishi, Takao Saito, Katsukiyo Ishikawa, Yutaka Tamaura | 1989-06-06 |
| 4814930 | Optical zero-phase current and zero phase voltage sensing arrangement | Syunzo Mase, Yoshinari Kozuka | 1989-03-21 |