Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889404 | Asymmetrical bidirectional telecommunication system | David Charlton | 1989-12-26 |
| 4877304 | Few-mode/single-mode fiber | — | 1989-10-31 |
| 4804248 | Data rate limiter for optical transmission system | — | 1989-02-14 |