Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809717 | Ventilated cigarette | Eberhard Teufel | 1989-03-07 |
| 4193412 | Additive for smoking tobacco products, filter elements thereof and process for the preparation thereof | Ernst Heim, Bruno Kliemann | 1980-03-18 |