Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5022994 | Fluid treatment system | Norman R. Avery, Dale J. Spangenberg, Jr., Kenneth C. Seuffer, Jr. | 1991-06-11 |
| 4764280 | Water softening apparatus | Keith E. Brown, Kenneth C. Seufer, Jr. | 1988-08-16 |
| 4427549 | Deionization method and apparatus | Keith E. Brown | 1984-01-24 |