Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE40037 | Electric power system protection and control system | Osamu Hasegawa, Yoshihiro Shirota | 2008-01-29 |
| 6198402 | Electric power system protection and control system | Osamu Hasegawa, Yosihiro Sirota | 2001-03-06 |