Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825460 | Line interface unit for caller-controlled receipt and delivery of voice messages | Howard E. Carter, Byron C. Pierce | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825460 | Line interface unit for caller-controlled receipt and delivery of voice messages | Howard E. Carter, Byron C. Pierce | 1989-04-25 |