Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4317960 | Telephone-conferencing and inquiry-handling apparatus and method | Avery R. Johnson | 1982-03-02 |
| 4317007 | Telephone-conferencing method and apparatus with monitor-only access | — | 1982-02-23 |