Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4413615 | Passive solar energy water preheat system using non-freezing heat transport mediums | — | 1983-11-08 |
| 4409959 | Solar energy water preheat system | — | 1983-10-18 |
| 4346731 | Buoyant element check valve for a thermosiphon energy system | — | 1982-08-31 |
| 4314667 | Thermal expansion check valve | — | 1982-02-09 |
| 4312687 | Solar collector headers | — | 1982-01-26 |