Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829512 | Loop-back control apparatus for a loop network having duplicate optical fiber transmission lines | Syoichiro Nakai | 1989-05-09 |
| 4796282 | Frame synchronization detection system | — | 1989-01-03 |