Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4901567 | Shaft device for a bellows-type gas meter | Heinrich Bertke, Reinhard Bruggemann, Joachim Schmidt, Werner Pohl, Martin Bronstrup +4 more | 1990-02-20 |
| 4856331 | Bellows-type gas meter | Horst Roese, Heinrich Bertke, Reinhard Bruggemann | 1989-08-15 |