Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5293597 | Concurrent context memory management unit | Frederick R. Keller | 1994-03-08 |
| 4914580 | Communication system having interrupts with dynamically adjusted priority levels | Frederick R. Keller | 1990-04-03 |
| 4821179 | Communication system configuration detection apparatus and method | Frederick R. Keller, Joel Morrow, Eric Anthony Roth | 1989-04-11 |