Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6427846 | Plastic filtration unit bonded by an L-shaped plastic melt | Andreas Graus, Christian Schäfer | 2002-08-06 |
| 5885455 | Filtration unit with pleated filter element | Andreas Graus | 1999-03-23 |
| 4900441 | Small filter and method of its manufacture | Andreas Graus | 1990-02-13 |