Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5186332 | Paper stock screening apparatus having heavy rejects trap | Derald R. Hatton, David E. Suica | 1993-02-16 |
| 5064537 | Seamless screen cylinder with laser cut openings | David E. Chupka, Christopher M. Vitori | 1991-11-12 |
| 5051151 | Side extraction pulper with screw type rotor | Derald R. Hatton | 1991-09-24 |