Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5589078 | Advanced filtration technique for fluid purification | Brian E. Butters | 1996-12-31 |
| 5554300 | Purification system | Brian E. Butters | 1996-09-10 |
| 5462674 | Method and system for photocatalytic decontamination | Brian E. Butters | 1995-10-31 |