Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860827 | Process and device for oil recovery using steam and oxygen-containing gas | Robert G. H. Lee, Derek Hornsey, Guillermo Garrido | 1989-08-29 |
| 4823710 | Non-peripheral blowing of oxygen-containing gas in steam generating boilers | Guillermo Garrido, Robert G. H. Lee, Derek Hornsey | 1989-04-25 |