Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4532917 | Modular passive solar energy heating unit employing phase change heat storage material which is clearly transparent when in its high-stored-energy liquid state | Robert B. Holdridge | 1985-08-06 |
| 4462390 | Modular solar greenhouse with elevated overhead heat storage material and movable insulation barriers and method and system for solar heating of attached living space using thermostat-controlled air circulation for harvesting heat | Robert B. Holdridge, William F. Yanda | 1984-07-31 |