Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5731065 | Multilayered, textile, gas-permeable filter material against toxic chemical substances | Helmut Stelzmuller, Hans-Joachim Topfer, Thomas Stoll | 1998-03-24 |
| 4815205 | Apparatus for mounting metal beginning pieces on a continuous slide fastener chain | — | 1989-03-28 |
| 4799424 | Fluid seal for moving belts | — | 1989-01-24 |
| 4714015 | Sealing arrangement for a medium-containing chamber of a dual belt press | — | 1987-12-22 |
| 4449448 | Double band press | Konrad Schermutzki | 1984-05-22 |