Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5425771 | Bone replacement part made of glass ionomer cement | Jan-Hinnerk Helms, Erich Wanek, Werner Zollner, Oswald Gasser | 1995-06-20 |
| 5314474 | Bone replacement part made of glass ionomer cement | Jan-Hinnerk Helms, Erich Wanek, Werner Zollner, Oswald Gasser | 1994-05-24 |