Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812623 | Piezoelectric transformer | Katsu Takeda, Takeshi Yamaguchi, Kojiro Okuyama, Katsunori Moritoki | 2004-11-02 |
| 6794796 | Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer | Katsunori Moritoki, Toshiyuki Asahi, Kojiro Okuyama, Osamu Kawasaki | 2004-09-21 |
| 6737816 | Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer | Katsunori Moritoki, Toshiyuki Asahi, Kojiro Okuyama, Osamu Kawasaki | 2004-05-18 |
| 6720705 | Method of driving a piezoelectric transformer and power source apparatus using the same | Takeshi Yamaguchi, Katsu Takeda, Katsunori Moritoki, Kojiro Okuyama | 2004-04-13 |