Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6123858 | Slow sand filter for use with intermittently flowing water supply and method of use thereof | — | 2000-09-26 |
| 5993672 | Slow sand filter for use with intermittently flowing water supply and method of use thereof | — | 1999-11-30 |
| 5904855 | Closed chemically enhanced treatment system | Vern John Gattinger | 1999-05-18 |