Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342859 | Method of producing rigid foams and products produced therefrom | Richard L. Donald | 1994-08-30 |
| 5294647 | Method of producing rigid foams and products produced therefrom | Robert BUTKUS, Andy I. McLaughlin, Richard L. Donald | 1994-03-15 |