Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4793154 | Centrifugal heat pump | Colin Ramshaw | 1988-12-27 |
| 4656839 | Heat pumps | Colin Ramshaw | 1987-04-14 |
| 4553408 | Centrifugal heat pump | Colin Ramshaw | 1985-11-19 |
| 4256551 | Electrolytic process | Michael J. Cliff, Colin Ramshaw | 1981-03-17 |