Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5725104 | Valve construction for high density pulp cleaner | — | 1998-03-10 |
| 5417809 | Water reuse system incorporating vacuum pump sealing water in a zero discharge process | Roger P. Hoffman | 1995-05-23 |