Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671252 | Bubble formation and circulation system | Robert A. Block | 1987-06-09 |
| 4478211 | Self-pumping solar heating system with geyser pumping action | Ralph E. Bartera | 1984-10-23 |