Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5207760 | Multi-megawatt pulsed inductive thruster | Ralph H. Lovberg, James L. Hieatt | 1993-05-04 |
| 5170623 | Hybrid chemical/electromagnetic propulsion system | Ralph H. Lovberg, Robert L. Sackheim, John J. Biess | 1992-12-15 |