Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6997596 | Plastic extruder screw tip | — | 2006-02-14 |
| 5628560 | Double-screw extruder | — | 1997-05-13 |
| 5350231 | Double worm extruder with meshing screws | — | 1994-09-27 |
| 5198242 | Rotary turret embosser | Hans Groeblacher, Ludwig Reisinger | 1993-03-30 |
| 4846648 | Triple-wall foam coextrusion apparatus | Steven E. Spence, Robert F. Shamet, Flavio Da Silva | 1989-07-11 |
| 4731002 | Triple-wall foam coextrusion apparatus | Steven E. Spence, Robert F. Shamet, Flavio Da Silva | 1988-03-15 |