Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7548170 | Rear door heat exchanger instrumentation for heat quantity measurement | Mark Lehmann, Michael Kurt Schaefer, Karl Uhl | 2009-06-16 |
| 7486511 | Passive rear door for controlled hot air exhaust | Jacques Hummel, Michael Kurt Schaefer, Karl Uhl | 2009-02-03 |