Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846107 | Aqua-cultivation apparatus and method | Karl G. Preis | 1989-07-11 |
| 4834361 | Vane wheel laying out device for printing products | Klaus Hertrich, Helmut Schumann, Rudolf Storr | 1989-05-30 |