Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855404 | Process and equipment for processing thermoplastic polymers | Stephen R. Betso, Kun S. Hyun | 1989-08-08 |
| 4847859 | Device and method for cooling a high temperature furnace | Jose Porchia, Roger K. Pihlaja | 1989-07-11 |