Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660724 | Multi-pressure head tank for use with vertical shaft bioreactors | — | 1997-08-26 |
| 5651892 | Biodegradeable effluent nutrient removal | — | 1997-07-29 |
| 5650070 | Aerobic long vertical shaft bioreactors | — | 1997-07-22 |
| 5645726 | Treatment of waste liquor in a vertical shaft bioreactor | — | 1997-07-08 |
| 5603263 | Scraper blade and ink scavenger for printing presses | Charles Henry Dufour | 1997-02-18 |