Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866709 | Dynamic frame length communication system | Boleslaw M. Sosin, Roger K. Tolfree | 1989-09-12 |
| 4862453 | Communication system | Boleslaw M. Sosin, Roger K. Tolfree | 1989-08-29 |