Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5151602 | Semiconductor relay circuit using photovoltaic diodes | Yukio Idaka, Hisakazu Miyajima, Takeshi Matsumoto, Yasunori Miyamoto | 1992-09-29 |
| 5057694 | Optoelectronic relay circuit having charging path formed by a switching transistor and a rectifying diode | Yukio Idaka, Takeshi Matsumoto | 1991-10-15 |
| 4805006 | Light receiving element | Yukio Idaka, Takeshi Matsumoto, Tatsuhiko Irie | 1989-02-14 |
| 4801822 | Semiconductor switching circuit | Yukio Idaka, Takeshi Matsumoto | 1989-01-31 |