Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852958 | Optical matrix switch having optimized crosstalk characteristics and uniform optical output intensity | Shigehiro Kusumoto, Keisuke Watanabe, Kiyoshi Nagai | 1989-08-01 |