Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886527 | Multilayer electret filter and process of using same | Walter Fottinger, Michael Hauber | 1989-12-12 |
| 4708756 | Process of producing a pliable roller | Dietmar Busen, Helmut Schluter, Norbert Blumler, Bohuslav Tecl | 1987-11-24 |