Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824723 | Flame resistant electrical insulating material | Richard W. Campbell | 1989-04-25 |
| 4804566 | Multilayer polyester structures and containers thereof | William C. Paul | 1989-02-14 |