Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5186332 | Paper stock screening apparatus having heavy rejects trap | Joseph P. Constiner, David E. Suica | 1993-02-16 |
| 5078275 | Screening apparatus for paper making stock | David E. Chupka, Terry L. Bliss, Peter Seifert, Jimmy L. Winkler | 1992-01-07 |
| 5051151 | Side extraction pulper with screw type rotor | Joseph P. Constiner | 1991-09-24 |
| 4399028 | Froth flotation apparatus and method | Gregory D. Kile, Larry D. Markham, Ronald D. Cruea | 1983-08-16 |
| 4356084 | Self-sealing valve assembly to facilitate unplugging of a centrifugal cleaner | David E. Chupka | 1982-10-26 |