Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5234546 | Polysulfide production in white liquor | — | 1993-08-10 |
| 5131980 | Hydrocyclone removal of sticky contaminants during paper recycling | Brian F. Greenwood | 1992-07-21 |
| 5069751 | Hydrocyclone deinking of paper during recycling | Brian F. Greenwood | 1991-12-03 |