Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7786717 | Transforming apparatus for automatically adjusting three-phase power supply voltage | Seiji Tsunemi | 2010-08-31 |
| 6066945 | Method and device for automatically switching three-phase voltage for power saving transformer | Koji Yabase, Kunio Shimazu | 2000-05-23 |
| 5654627 | Method of automatically changing upper, balanced and lower voltage in electric power saving transformer and the device of the same | Kunio Shimazu | 1997-08-05 |