Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5762657 | Air lock valve in a carbon extraction portion of a pyrolysis gasifier | Leonard G. Beierle, John J. Fitzgerald | 1998-06-09 |
| 5755837 | Fuel spreader assembly for use in a gasifier | Leonard G. Beierle, John J. Fitzgerald | 1998-05-26 |
| 5618321 | Pyrolysis gasifier with inner sleeve member | Leonard G. Beierle, John J. Fitzgerald | 1997-04-08 |