Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5144620 | Cross-connection network using time switch | Yasutoshi Ishizaki, Rikio Maruta, Yoshinori Rokugo, Hisashi Sakaguchi | 1992-09-01 |
| 4935921 | Cross-connection network using time switch | Yasutoshi Ishizaki, Rikio Maruta, Yoshinori Rokugo, Hisashi Sakaguchi | 1990-06-19 |