Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4407865 | Process for coating a sterilizing filter material with silver and product formed thereby | — | 1983-10-04 |
| 4279753 | Wastewater treatment system including multiple stages of alternate aerobic-anerobic bioreactors in series | Niel E. Nielson, Ronald L. Kreiling, Robert C. Hill | 1981-07-21 |
| 4233152 | Apparatus and method for the treatment of liquors | Robert C. Hill, Niel E. Nielson, Ronald L. Kreiling | 1980-11-11 |