Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691643 | Ground fault detecting apparatus and method for detecting ground fault of field circuit and exciting circuit by detecting ground fault current flowing from ground to neutral point of exciting circuit | Yoshinori Takei | 1997-11-25 |
| 5616450 | Method for fabricating an optical information medium | Yuji Arai, Takanobu Matumoto, Yuaki Shin | 1997-04-01 |