Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4943510 | Polyester film | Karl-Heinz Jung | 1990-07-24 |
| 4876155 | Polyester film | Karl-Heinz Jung | 1989-10-24 |
| 4824725 | Drafting material | — | 1989-04-25 |
| 4543285 | Plastic film | — | 1985-09-24 |
| 4543316 | Drafting material | — | 1985-09-24 |
| 4500598 | Drafting film | — | 1985-02-19 |
| 4457997 | Two-component diazotype material | Hans-Dieter Frommeld, Siegfried Scheler | 1984-07-03 |
| 4317875 | Recording material containing diazo compounds and process for the manufacture thereof | Siegfried Scheler | 1982-03-02 |
| 4202923 | Drawing layer for plastic films | — | 1980-05-13 |