Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874796 | Expandable thermoplastic resin beads | William E. Gibbs, Lynn M. Hans | 1989-10-17 |
| 4857390 | Low density extruded foam having high compressive strength | Barbara M. Bacskai, Daniel L. Roberts, Richard C. Bopp | 1989-08-15 |