Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5446645 | Inverter apparatus and uinterruptible power supply using the same | Hidefumi Shirahama, Akira Kobayashi, Keizo Shimada, Norikazu Tokunaga, Yoshimi Sakurai +3 more | 1995-08-29 |
| 5298848 | Large capacity variable speed PWM spatial vector type sub-harmonic system for driving AC electric motor | Shigeta Ueda, Takashi Ikimi, Mitsuyuki Hombu, Noboru Ogawa, Kenzo Kamiyama | 1994-03-29 |
| 4306138 | Power supply apparatus for resistance welder including means for preventing polarized transformer excitation | Norikazu Tokunaga, Hisao Amano | 1981-12-15 |