Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885315 | Foamable thermoplastic polymers and a method for foaming | Gerald M. Lancaster | 1989-12-05 |
| 4853420 | Foamable thermoplastic polymers and a method for foaming | Gerald M. Lancaster | 1989-08-01 |