Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5237972 | Two-stage cycle engine and combustion chamber | Edward G. Groff, Ramachandra Diwakar | 1993-08-24 |
| 4955338 | Engine and high turbulence piston therefor | Ramachandra Diwakar, Roger B. Krieger, Edward G. Groff | 1990-09-11 |