Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4302406 | Apparatus for heating water in a reservoir | — | 1981-11-24 |
| 4270523 | Heat storage apparatus and heat exchanger element for use therein | — | 1981-06-02 |
| 4250885 | Method and apparatus for utilizing solar heat for heating a building | — | 1981-02-17 |
| 4219010 | Method and apparatus for utilizing solar heat | — | 1980-08-26 |