Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5619601 | Optical switch and optical distributor using polarization control and partial reflection | Tamotsu Akashi, Tsuyoshi Yamamoto | 1997-04-08 |
| 5162944 | Optical space switch and network for such optical space switches | Tsuyoshi Yamamoto, Hiroyasu Itoh | 1992-11-10 |