Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9291686 | Method of estimating the residual magnetic flux of transformer and residual magnetic flux estimation device | Tadashi Koshizuka, Minoru Saitoh, Yoshimasa Sato, Hiroyuki Maehara | 2016-03-22 |
| 9197057 | Magnetizing inrush current suppression apparatus | Tadashi Koshizuka, Shiro Maruyama, Minoru Saitoh, Noriyuki Nagayama | 2015-11-24 |
| 8564159 | Transformer inrush current suppression apparatus | Tadashi Koshizuka, Shiro Maruyama, Minoru Saito, Noriyuki Nagayama | 2013-10-22 |