Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5418776 | Emergency local switching | Robert C. Purkey, Steven Peter Spencer | 1995-05-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5418776 | Emergency local switching | Robert C. Purkey, Steven Peter Spencer | 1995-05-23 |