Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4401612 | Method and apparatus for extruding foam polymeric materials involving the use of an extrusion screw having spaced multiple flight mixing means thereon | James W. Summers | 1983-08-30 |
| 4393017 | Apparatus and method for making foamed resin products | Hueng T. Kim | 1983-07-12 |