Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5361157 | Bidirectional light transmission system and optical device therefor | Tadasu Ishikawa, Mikio Maeda, Kimiyuki Oyamada, Shuichi Fujisawa, Kunihara Takizawa | 1994-11-01 |
| 4807954 | Optical coupling device | Kimiyuki Oyamada | 1989-02-28 |