Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985913 | Multiple message answering machine keyed to the incoming phone number | David Cane | 1991-01-15 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985913 | Multiple message answering machine keyed to the incoming phone number | David Cane | 1991-01-15 |