Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877393 | Apparatus for producing biaxially oriented polymer sheet | — | 1989-10-31 |
| 4874657 | Methods of producing biaxially-oriented polymer product, and the product produced thereby | Darral V. Humphries | 1989-10-17 |