Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7419595 | Multiple barrier biological treatment process | Lloyd W. Johnson, Dennis M. Gleason, Edward W. Lang | 2008-09-02 |
| 7014763 | Multiple barrier biological treatment systems | Lloyd W. Johnson, Dennis M. Gleason, Edward W. Lang | 2006-03-21 |
| 6875357 | Process and apparatus for treatment of waste water | Lloyd W. Johnson | 2005-04-05 |
| 6613222 | Apparatus for the treatment of waste water | Lloyd W. Johnson | 2003-09-02 |