Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4639257 | Recovery of carbon dioxide from gas mixture | David I. Limb | 1987-01-27 |
| 4496383 | Production of nitrogen from air | Colin Hubbard, David I. Limb | 1985-01-29 |
| 4461634 | Separation of gas mixtures by partial condensation | Gregory J. Ashton, David Salisbury | 1984-07-24 |