Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4908940 | Method of manufacturing two-layer printed circuit sheet | Toshiaki Amano, Tomoya Kato, Kenzo Kobayashi | 1990-03-20 |
| 4836636 | Optical switch and optical keyboard utilizing the same | Yuichi Obara, Kenichi Fuse, Takao Toya, Kazuo Chiba | 1989-06-06 |