Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834924 | Extrusion apparatus for tubular thermoplastic films including two (tandem) spaced air rings for controlling cooling rate and production speeds | Eric A. St. Phillips, Gordon V. Sharps, Jr. | 1989-05-30 |