Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691686 | Transformer zero-phase current transformer | Masahiro Ishikawa, Osamu Hasegawa, Morio Machida | 1997-11-25 |
YO
Yasuhiko Ookubo
Overall (1997): #57,333 of 185,788Top 35%
1
Patents 1997