Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5946927 | Heat pump water heater and storage tank assembly | John T. Dieckmann, Brian J. Nowicki, Robert A. Zogg | 1999-09-07 |
| 5906109 | Heat pump water heater and storage tank assembly | John T. Dieckmann, Brian J. Nowicki, Robert A. Zogg | 1999-05-25 |
| 4474018 | Heat pump system for production of domestic hot water | — | 1984-10-02 |
| 4232656 | Integral storage collector solar heating system | — | 1980-11-11 |