Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4379051 | Filtering apparatus | Edwin Hiesinger, Klaus Keplinger | 1983-04-05 |
| 4367150 | Filtering method and apparatus | Edwin Hiesinger, Klaus Keplinger | 1983-01-04 |
| 4297211 | Filtering apparatus | Edwin Hiesinger, Klaus Keplinger | 1981-10-27 |
| 4285821 | Filtering method | Edwin Hiesinger, Klaus Keplinger | 1981-08-25 |