Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812623 | Piezoelectric transformer | Katsu Takeda, Hiroshi Nakatsuka, Takeshi Yamaguchi, Kojiro Okuyama | 2004-11-02 |
| 6794796 | Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer | Hiroshi Nakatsuka, 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 | Hiroshi Nakatsuka, Toshiyuki Asahi, Kojiro Okuyama, Osamu Kawasaki | 2004-05-18 |
| 6720705 | Method of driving a piezoelectric transformer and power source apparatus using the same | Hiroshi Nakatsuka, Takeshi Yamaguchi, Katsu Takeda, Kojiro Okuyama | 2004-04-13 |
| 6710682 | Surface acoustic wave device, method for producing the same, and circuit module using the same | Keiji Onishi, Akihiro Nanba, Hiroki Sato, Yoshihiro Bessho, Kunihiro Fujii +1 more | 2004-03-23 |