Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839067 | Process for lubricating and cleaning of bottle conveyor belts in the beverage industry | — | 1989-06-13 |
| 4832107 | Method of producing a cast-iron element | Rudi Hass, Wilhelm Kallen | 1989-05-23 |