Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6342752 | Piezoelectric transformer element and method of mounting it in a housing | Takeshi Fujimura, Katsuyuki Ishikawa, Takahiro Yamakawa, Keizo Tsukamoto | 2002-01-29 |
| 6172447 | Piezoelectric transformer device | Katsuyuki Ishikawa, Takeshi Fujimura, Masaaki Toyama, Toru Ezaki, Takahiro Yamakawa +1 more | 2001-01-09 |