Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5088241 | Polishing device | Johannes Lubbering, Jurgen Busse, Erwin Schmitz, Wolfgang Volker | 1992-02-18 |
| 5088242 | Polishing device | Johannes Lubbering, Jurgen Busse, Erwin Schmitz, Wolfgang Volker | 1992-02-18 |