Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7481934 | Methods for treatment of wastewater with powdered natural lignocellulosic material | — | 2009-01-27 |
| 5636472 | Apparatus for the continuous cultivation of aquatic macrophytes | William M. Spira | 1997-06-10 |