Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5917905 | Telephone station equipment employing rewriteable display keys | David L. Whipple, Gerald B. Gulley | 1999-06-29 |
| 5790652 | Telephone station equipment employing rewriteable display keys | Gerald B. Gulley, David L. Whipple | 1998-08-04 |