Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4657587 | Molten metal casting | Robert G. H. Lee | 1987-04-14 |
| 4614216 | Method of and apparatus for casting metal using carbon dioxide to form gas shield | Robert G. H. Lee | 1986-09-30 |
| 4557329 | Oil recovery by in-situ combustion | Robert G. H. Lee | 1985-12-10 |
| 4509595 | In situ combustion for oil recovery | Robert G. H. Lee | 1985-04-09 |
| 4336064 | Method of improving the performance of submerged oxygen injectors | Robert G. H. Lee | 1982-06-22 |
| 4315774 | Method of safely injecting oxygen reactive materials into a submerged oxygen gas stream | Robert G. H. Lee | 1982-02-16 |
| 4311518 | Homogenization of metal using gas | Robert G. H. Lee | 1982-01-19 |
| 4301007 | Two zone apparatus for biological treatment of waste water | Robert G. H. Lee, Derek Hornsey | 1981-11-17 |
| 4284510 | Two zone process for biological treatment of waste water | Robert G. H. Lee, Derek Hornsey | 1981-08-18 |
| 4246111 | Apparatus for biological treatment of waste water | Robert G. H. Lee, Derek Hornsey | 1981-01-20 |
| 4192740 | Two zone process for biological treatment of waste water | Robert G. H. Lee, Derek Hornsey | 1980-03-11 |