Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6486612 | Control circuit and method for protecting a piezoelectric transformer from an open state and a short-circuited state | Katsuyuki Ishikawa, Masaaki Toyama | 2002-11-26 |
| 6363903 | Intake port structure in four-stroke cycle internal combustion engine | Aruto Hayashi, Seiji Mori | 2002-04-02 |
| 6342752 | Piezoelectric transformer element and method of mounting it in a housing | Masako Kataoka, Katsuyuki Ishikawa, Takahiro Yamakawa, Keizo Tsukamoto | 2002-01-29 |