Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4450868 | Freeze protection apparatus for solar collectors | Eugene F. Duval, David P. Bagshaw, Michael Kast, Harry T. Whitehouse | 1984-05-29 |
| 4280478 | Freeze protection apparatus for solar collectors | Eugene F. Duval, David P. Bagshaw, Michael Kast, Harry T. Whitehouse | 1981-07-28 |