Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5068020 | Coated substrates and process | Wei-Kan Chu | 1991-11-26 |
| 4785869 | Method of sizing a hot top liner and assembling a hot top | Enn Vallak, Hannes Vallak | 1988-11-22 |
| 4721278 | Lightweight reusable hot top | Enn Vallak, Hannes Vallak | 1988-01-26 |