Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876155 | Polyester film | Karl-Heinz Jung | 1989-10-24 |
| 4824725 | Drafting material | — | 1989-04-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876155 | Polyester film | Karl-Heinz Jung | 1989-10-24 |
| 4824725 | Drafting material | — | 1989-04-25 |