Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10477779 | Botanical air filtration system and method | — | 2019-11-19 |
| 7810353 | Heat pump system with multi-stage compression | Eckard A. Groll, Stefan Bertsch, David B. Bouffard | 2010-10-12 |
| 7654104 | Heat pump system with multi-stage compression | Eckard A. Groll, Stefan Bertsch, David B. Bouffard | 2010-02-02 |
| 5193628 | Method and apparatus for determining path orientation of a passageway | John Hill, Eugene L. Foster | 1993-03-16 |