Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869800 | Cell arrangement for a filter press type stack of cells | Hartmut Wendt | 1989-09-26 |
| 4842478 | Dental suction apparatus | Walter Durr, Andreas Bollmann | 1989-06-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869800 | Cell arrangement for a filter press type stack of cells | Hartmut Wendt | 1989-09-26 |
| 4842478 | Dental suction apparatus | Walter Durr, Andreas Bollmann | 1989-06-27 |