Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4496799 | Handsfree telephone instrument using digital dial | Robert Hume Duncan | 1985-01-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4496799 | Handsfree telephone instrument using digital dial | Robert Hume Duncan | 1985-01-29 |