Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7819171 | Air conditioning system | Thomas Alberternst, Michael Fietz, Graham R. Johnstone, Graham D. Kirby | 2010-10-26 |
| 7434612 | Multiple zoned air conditioning system | Thomas Alberternst, Michael Fietz, Graham R. Johnstone, Graham D. Kirby | 2008-10-14 |