Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4419159 | Manufacture of plastic bags with interlocking profile extrusions | — | 1983-12-06 |
| 4395221 | Tubular extrusion apparatus | — | 1983-07-26 |
| 4289727 | Method for extrusion of tubular films | — | 1981-09-15 |
| 4285656 | Tubular extrusion apparatus | — | 1981-08-25 |
| 4268239 | Tubular extrusion die | — | 1981-05-19 |
| 4234018 | Flow distribution valve system for control of extrusion from multiple die orifices | — | 1980-11-18 |
| 4219516 | Method for controlling flow of molten polymer to multiple extrusion die orifices | — | 1980-08-26 |
| 4209475 | Method and apparatus for effecting uniform film thickness | Alvin J. Stein | 1980-06-24 |