Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8664790 | Underwater power generator with dual blade sets | John Keir, Drew Blaxland | 2014-03-04 |
| 8633609 | Sub sea central axis turbine with rearwardly raked blades | Gary Campbell, John Keir, Drew Blaxland, Peter Pielach | 2014-01-21 |