Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4411618 | Downhole steam generator with improved preheating/cooling features | A. Burl Donaldson, Anthony J. Mulac | 1983-10-25 |
| 4366860 | Downhole steam injector | A. Burl Donaldson | 1983-01-04 |