Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6750623 | Reversible automatic fan control system | Thomas A. McCauley, Bryan A. Vogt | 2004-06-15 |
| 4850288 | Pressurized cyclonic combustion method and burner for particulate solid fuels | Franklin D. Hoffert, J. David Milligan | 1989-07-25 |
| 4724780 | Pressurized cyclonic combustion method and burner for particulate solid fuels | Franklin D. Hoffert, J. David Milligan | 1988-02-16 |
| 4671192 | Pressurized cyclonic combustion method and burner for particulate solid fuels | Franklin D. Hoffert, J. David Milligan | 1987-06-09 |