Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856205 | Air guide box for the drying section of a high-speed paper machine | Wolfgang Muller, Helmut Heinzmann | 1989-08-15 |
| 4809445 | Device for stabilizing the run of a material web, specifically for stabilizing a paper web in the drying section of a paper machine | Helmut Heinzmann, Wolfgang Muller | 1989-03-07 |