Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304819 | Light-activated semiconductor device having light-emitting elements, light-receiving elements and output elements | Hiroyasu Torazawa, Kenji Mizuuchi | 1994-04-19 |
| 4489340 | PNPN Light sensitive semiconductor switch with phototransistor connected across inner base regions | Jun Ueda, Haruo Mori, Hirokazu Tsukada, Kotaro Kato | 1984-12-18 |
| 4244000 | PNPN Semiconductor switches | Jun Ueda, Haruo Mori, Kotaro Kato | 1981-01-06 |