Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4898671 | Filtering device for the separation of liquids and solids | Ludwig Gresa | 1990-02-06 |
| 4702847 | Process for removing solids from a filtering device for the separation of liquids and solids | Ludwig Gresa | 1987-10-27 |