Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5659298 | Method and apparatus for delivering messages in a communication system | David Terris | 1997-08-19 |
| 5218629 | Communication system for message display onboard mass transit vehicles | David I. Dumond | 1993-06-08 |