Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839150 | Production of silicon carbide | Roy T. Coyle | 1989-06-13 |
| 4798668 | Extraction of hydrocarbon-containing solids | — | 1989-01-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839150 | Production of silicon carbide | Roy T. Coyle | 1989-06-13 |
| 4798668 | Extraction of hydrocarbon-containing solids | — | 1989-01-17 |