Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5448098 | Superconductive photoelectric switch | Koji Shinohara, Osamu Ohtsuki, Sadao Takaoka | 1995-09-05 |
| 4503316 | DC Welding power supply system | Toshihiko Watanabe, Naoki Takeuchi, Tokuji Maruyama | 1985-03-05 |