Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886118 | Conductively heating a subterranean oil shale to create permeability and subsequently produce oil | Eric Pierre de Rouffignac, Harold J. Vinegar, Michael F. Lucid | 1989-12-12 |