Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5505846 | Plate shifter for filter press | Daniel DeHaan, John A. VerBerkmoes, Nelson H. Tansey | 1996-04-09 |
| 5370795 | Plate shifter for filter press | Daniel DeHaan, John A. VerBerkmoes, Nelson H. Tansey | 1994-12-06 |