Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7841826 | Slag reduction pump | — | 2010-11-30 |
| 5725761 | Modular filter / circulation system and traveling main drain for in-ground swimming pools | — | 1998-03-10 |
| 4238430 | Method for forming expanded cellular volcanic ash | — | 1980-12-09 |
| 4238546 | Lightweight gypsum products and methods of making same | — | 1980-12-09 |