Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8324816 | LED driving circuit | Mitsuo Ohashi, Hideyuki Komatsu | 2012-12-04 |
| 7511389 | Emergency electric power supply unit | Tadahiko Ozawa, Tetsuo Torii, Norio Ashitate | 2009-03-31 |
| 4614144 | Music card system | Koichi Nakagawa, Shintaro Hotta | 1986-09-30 |
| 4518827 | Telephone answering and message recording system | — | 1985-05-21 |
| 4482787 | Telephone-call prohibit circuit | Keisuke Kataoka | 1984-11-13 |